diff --git a/config-unix.mk b/config-unix.mk
index 98d89397..b132cb5b 100644
--- a/config-unix.mk
+++ b/config-unix.mk
@@ -48,6 +48,7 @@ endif
 ifeq (Linux,$(uname_S))
 EV_CONFIG=config_linux.h
 EIO_CONFIG=config_linux.h
+CSTDFLAG += -D_XOPEN_SOURCE=600
 CPPFLAGS += -Isrc/ares/config_linux
 LINKFLAGS+=-lrt
 UV_OS_FILE=uv-linux.c
diff --git a/include/ares.h b/include/ares.h
index a8d38157..905a29ee 100644
--- a/include/ares.h
+++ b/include/ares.h
@@ -52,6 +52,7 @@
 
 #else /* Not Windows */
 
+# include <sys/time.h>
 # include <sys/types.h>
 # include <sys/socket.h>
 #endif