diff --git a/config-unix.mk b/config-unix.mk
index 7f596fb8..53bcbd4c 100644
--- a/config-unix.mk
+++ b/config-unix.mk
@@ -82,6 +82,15 @@ OBJS += src/unix/netbsd.o
 OBJS += src/unix/kqueue.o
 endif
 
+ifeq (OpenBSD,$(uname_S))
+EV_CONFIG=config_openbsd.h
+EIO_CONFIG=config_openbsd.h
+CPPFLAGS += -Isrc/ares/config_openbsd
+LINKFLAGS+=
+OBJS += src/unix/openbsd.o
+OBJS += src/unix/kqueue.o
+endif
+
 ifneq (,$(findstring CYGWIN,$(uname_S)))
 EV_CONFIG=config_cygwin.h
 EIO_CONFIG=config_cygwin.h
diff --git a/src/unix/eio/config_openbsd.h b/src/unix/eio/config_openbsd.h
new file mode 100644
index 00000000..a73b8a88
--- /dev/null
+++ b/src/unix/eio/config_openbsd.h
@@ -0,0 +1,137 @@
+/* config.h.  Generated from config.h.in by configure.  */
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#define HAVE_DLFCN_H 1
+
+/* fallocate(2) is available */
+/* #undef HAVE_FALLOCATE */
+
+/* fdatasync(2) is available */
+/* #undef HAVE_FDATASYNC */
+
+/* futimes(2) is available */
+#define HAVE_FUTIMES 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the <memory.h> header file. */
+#define HAVE_MEMORY_H 1
+
+/* posix_fadvise(2) is available */
+/* #undef HAVE_POSIX_FADVISE */
+
+/* posix_madvise(2) is available */
+#define HAVE_POSIX_MADVISE 1
+
+/* prctl(PR_SET_NAME) is available */
+/* #undef HAVE_PRCTL_SET_NAME */
+
+/* pread(2) and pwrite(2) are available */
+#define HAVE_PREADWRITE 1
+
+/* readahead(2) is available (linux) */
+/* #undef HAVE_READAHEAD */
+
+/* sendfile(2) is available and supported */
+/* #undef HAVE_SENDFILE */
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the <strings.h> header file. */
+#define HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* sync_file_range(2) is available */
+/* #undef HAVE_SYNC_FILE_RANGE */
+
+/* Define to 1 if you have the <sys/prctl.h> header file. */
+/* #undef HAVE_SYS_PRCTL_H */
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* syscall(__NR_syncfs) is available */
+/* #undef HAVE_SYS_SYNCFS */
+
+/* Define to 1 if you have the <sys/syscall.h> header file. */
+#define HAVE_SYS_SYSCALL_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 1
+
+/* utimes(2) is available */
+#define HAVE_UTIMES 1
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#define LT_OBJDIR ".libs/"
+
+/* Name of package */
+#define PACKAGE "libeio"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT ""
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME ""
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING ""
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME ""
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL ""
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION ""
+
+/* Define to 1 if you have the ANSI C header files. */
+#define STDC_HEADERS 1
+
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# define _ALL_SOURCE 1
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE 1
+#endif
+/* Enable threading extensions on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# define _POSIX_PTHREAD_SEMANTICS 1
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# define _TANDEM_SOURCE 1
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# define __EXTENSIONS__ 1
+#endif
+
+
+/* Version number of package */
+#define VERSION "1.0"
+
+/* Define to 1 if on MINIX. */
+/* #undef _MINIX */
+
+/* Define to 2 if the system does not provide POSIX.1 features except with
+   this defined. */
+/* #undef _POSIX_1_SOURCE */
+
+/* Define to 1 if you need to in order for `stat' and other things to work. */
+/* #undef _POSIX_SOURCE */
diff --git a/src/unix/ev/config_openbsd.h b/src/unix/ev/config_openbsd.h
new file mode 100644
index 00000000..8bc9b890
--- /dev/null
+++ b/src/unix/ev/config_openbsd.h
@@ -0,0 +1,126 @@
+/* config.h.  Generated from config.h.in by configure.  */
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define to 1 if you have the `clock_gettime' function. */
+#define HAVE_CLOCK_GETTIME 1
+
+/* "use syscall interface for clock_gettime" */
+/* #undef HAVE_CLOCK_SYSCALL */
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#define HAVE_DLFCN_H 1
+
+/* Define to 1 if you have the `epoll_ctl' function. */
+/* #undef HAVE_EPOLL_CTL */
+
+/* Define to 1 if you have the `eventfd' function. */
+/* #undef HAVE_EVENTFD */
+
+/* Define to 1 if you have the `inotify_init' function. */
+/* #undef HAVE_INOTIFY_INIT */
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the `kqueue' function. */
+#define HAVE_KQUEUE 1
+
+/* Define to 1 if you have the `m' library (-lm). */
+#define HAVE_LIBM 1
+
+/* Define to 1 if you have the `rt' library (-lrt). */
+/* #undef HAVE_LIBRT */
+
+/* Define to 1 if you have the <memory.h> header file. */
+#define HAVE_MEMORY_H 1
+
+/* Define to 1 if you have the `nanosleep' function. */
+#define HAVE_NANOSLEEP 1
+
+/* Define to 1 if you have the `poll' function. */
+#define HAVE_POLL 1
+
+/* Define to 1 if you have the <poll.h> header file. */
+#define HAVE_POLL_H 1
+
+/* Define to 1 if you have the `port_create' function. */
+/* #undef HAVE_PORT_CREATE */
+
+/* Define to 1 if you have the <port.h> header file. */
+/* #undef HAVE_PORT_H */
+
+/* Define to 1 if you have the `select' function. */
+#define HAVE_SELECT 1
+
+/* Define to 1 if you have the `signalfd' function. */
+/* #undef HAVE_SIGNALFD */
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the <strings.h> header file. */
+#define HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define to 1 if you have the <sys/epoll.h> header file. */
+/* #undef HAVE_SYS_EPOLL_H */
+
+/* Define to 1 if you have the <sys/eventfd.h> header file. */
+/* #undef HAVE_SYS_EVENTFD_H */
+
+/* Define to 1 if you have the <sys/event.h> header file. */
+#define HAVE_SYS_EVENT_H 1
+
+/* Define to 1 if you have the <sys/inotify.h> header file. */
+/* #undef HAVE_SYS_INOTIFY_H */
+
+/* Define to 1 if you have the <sys/select.h> header file. */
+#define HAVE_SYS_SELECT_H 1
+
+/* Define to 1 if you have the <sys/signalfd.h> header file. */
+/* #undef HAVE_SYS_SIGNALFD_H */
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 1
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#define LT_OBJDIR ".libs/"
+
+/* Name of package */
+#define PACKAGE "libev"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT ""
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME ""
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING ""
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME ""
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL ""
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION ""
+
+/* Define to 1 if you have the ANSI C header files. */
+#define STDC_HEADERS 1
+
+/* Version number of package */
+#define VERSION "4.04"
diff --git a/src/unix/openbsd.c b/src/unix/openbsd.c
new file mode 100644
index 00000000..98af6d0f
--- /dev/null
+++ b/src/unix/openbsd.c
@@ -0,0 +1,123 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <sys/sysctl.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#undef NANOSEC
+#define NANOSEC 1000000000
+
+
+uint64_t uv_hrtime(void) {
+  struct timespec ts;
+  clock_gettime(CLOCK_MONOTONIC, &ts);
+  return (ts.tv_sec * NANOSEC + ts.tv_nsec);
+}
+
+void uv_loadavg(double avg[3]) {
+  struct loadavg info;
+  size_t size = sizeof(info);
+  int which[] = {CTL_VM, VM_LOADAVG};
+
+  if (sysctl(which, 2, &info, &size, NULL, 0) < 0) return;
+
+  avg[0] = (double) info.ldavg[0] / info.fscale;
+  avg[1] = (double) info.ldavg[1] / info.fscale;
+  avg[2] = (double) info.ldavg[2] / info.fscale;
+}
+
+int uv_exepath(char* buffer, size_t* size) {
+  int mib[4];
+  char **argsbuf = NULL;
+  char **argsbuf_tmp;
+  size_t argsbuf_size = 100U;
+  size_t exepath_size;
+  pid_t mypid;
+  int status = -1;
+
+  if (!buffer || !size) {
+    goto out;
+  }
+  mypid = getpid();
+  for (;;) {
+    if ((argsbuf_tmp = realloc(argsbuf, argsbuf_size)) == NULL) {
+      goto out;
+    }
+    argsbuf = argsbuf_tmp;
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC_ARGS;
+    mib[2] = mypid;
+    mib[3] = KERN_PROC_ARGV;
+    if (sysctl(mib, 4, argsbuf, &argsbuf_size, NULL, 0) == 0) {
+      break;
+    }
+    if (errno != ENOMEM) {
+      goto out;
+    }
+    argsbuf_size *= 2U;
+  }
+  if (argsbuf[0] == NULL) {
+    goto out;
+  }
+  exepath_size = strlen(argsbuf[0]);
+  if (exepath_size >= *size) {
+    goto out;
+  }
+  memcpy(buffer, argsbuf[0], exepath_size + 1U);
+  *size = exepath_size;
+  status = 0;
+
+out:
+  free(argsbuf);
+
+  return status;
+}
+
+double uv_get_free_memory(void) {
+  struct uvmexp info;
+  size_t size = sizeof(info);
+  int which[] = {CTL_VM, VM_UVMEXP};
+
+  if (sysctl(which, 2, &info, &size, NULL, 0) < 0) {
+    return -1;
+  }
+
+  return (double) info.free * sysconf(_SC_PAGESIZE);
+}
+
+double uv_get_total_memory(void) {
+  uint64_t info;
+  int which[] = {CTL_HW, HW_PHYSMEM64};
+  size_t size = sizeof(info);
+
+  if (sysctl(which, 2, &info, &size, NULL, 0) < 0) {
+    return -1;
+  }
+
+  return (double) info;
+}
diff --git a/uv.gyp b/uv.gyp
index 900551ec..6af52f19 100644
--- a/uv.gyp
+++ b/uv.gyp
@@ -235,6 +235,13 @@
             'EV_CONFIG_H="config_freebsd.h"',
             'EIO_CONFIG_H="config_freebsd.h"',
           ],
+        [ 'OS=="openbsd"', {
+          'include_dirs': [ 'src/ares/config_openbsd' ],
+          'sources': [ 'src/unix/openbsd.c' ],
+          'defines': [
+            'EV_CONFIG_H="config_openbsd.h"',
+            'EIO_CONFIG_H="config_openbsd.h"',
+          ],
         }],
         [ 'OS=="mac" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd"', {
           'sources': [ 'src/unix/kqueue.c' ],