diff --git a/config-unix.mk b/config-unix.mk
index 65d9ba7e..c28dda4a 100644
--- a/config-unix.mk
+++ b/config-unix.mk
@@ -27,6 +27,7 @@ LINKFLAGS=-lm
 CPPFLAGS += -D_LARGEFILE_SOURCE
 CPPFLAGS += -D_FILE_OFFSET_BITS=64
 
+OBJS += src/unix/async.o
 OBJS += src/unix/cares.o
 OBJS += src/unix/core.o
 OBJS += src/unix/dl.o
diff --git a/src/unix/async.c b/src/unix/async.c
new file mode 100644
index 00000000..f5d005a2
--- /dev/null
+++ b/src/unix/async.c
@@ -0,0 +1,52 @@
+/* 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 "uv.h"
+#include "internal.h"
+
+
+static void uv__async(EV_P_ ev_async* w, int revents) {
+  uv_async_t* async = container_of(w, uv_async_t, async_watcher);
+
+  if (async->async_cb) {
+    async->async_cb(async, 0);
+  }
+}
+
+
+int uv_async_init(uv_loop_t* loop, uv_async_t* async, uv_async_cb async_cb) {
+  uv__handle_init(loop, (uv_handle_t*)async, UV_ASYNC);
+  loop->counters.async_init++;
+
+  ev_async_init(&async->async_watcher, uv__async);
+  async->async_cb = async_cb;
+
+  /* Note: This does not have symmetry with the other libev wrappers. */
+  ev_async_start(loop->ev, &async->async_watcher);
+  ev_unref(loop->ev);
+
+  return 0;
+}
+
+
+int uv_async_send(uv_async_t* async) {
+  ev_async_send(async->loop->ev, &async->async_watcher);
+  return 0;
+}
diff --git a/src/unix/core.c b/src/unix/core.c
index 55efbf98..9832e81a 100644
--- a/src/unix/core.c
+++ b/src/unix/core.c
@@ -502,36 +502,6 @@ int uv_is_active(uv_handle_t* handle) {
 }
 
 
-static void uv__async(EV_P_ ev_async* w, int revents) {
-  uv_async_t* async = container_of(w, uv_async_t, async_watcher);
-
-  if (async->async_cb) {
-    async->async_cb(async, 0);
-  }
-}
-
-
-int uv_async_init(uv_loop_t* loop, uv_async_t* async, uv_async_cb async_cb) {
-  uv__handle_init(loop, (uv_handle_t*)async, UV_ASYNC);
-  loop->counters.async_init++;
-
-  ev_async_init(&async->async_watcher, uv__async);
-  async->async_cb = async_cb;
-
-  /* Note: This does not have symmetry with the other libev wrappers. */
-  ev_async_start(loop->ev, &async->async_watcher);
-  ev_unref(loop->ev);
-
-  return 0;
-}
-
-
-int uv_async_send(uv_async_t* async) {
-  ev_async_send(async->loop->ev, &async->async_watcher);
-  return 0;
-}
-
-
 static int uv_getaddrinfo_done(eio_req* req) {
   uv_getaddrinfo_t* handle = req->data;
   struct addrinfo *res = handle->res;
diff --git a/uv.gyp b/uv.gyp
index e78e6baf..6e23b477 100644
--- a/uv.gyp
+++ b/uv.gyp
@@ -180,6 +180,7 @@
             'include/uv-private/ev.h',
             'include/uv-private/ngx-queue.h',
             'include/uv-private/uv-unix.h',
+            'src/unix/async.c',
             'src/unix/cares.c',
             'src/unix/core.c',
             'src/unix/dl.c',