diff --git a/src/uv-linux.c b/src/uv-linux.c
index dc718c6d..ef9adba7 100644
--- a/src/uv-linux.c
+++ b/src/uv-linux.c
@@ -22,6 +22,7 @@
 
 #include <stdint.h>
 #include <stddef.h>
+#include <unistd.h>
 #include <time.h>
 
 #undef NANOSEC