diff --git a/ipc/chromium/src/base/file_util.cc b/ipc/chromium/src/base/file_util.cc
index 1154fedf487..6067a4ad70a 100644
--- a/ipc/chromium/src/base/file_util.cc
+++ b/ipc/chromium/src/base/file_util.cc
@@ -8,7 +8,7 @@
 #include <io.h>
 #endif
 #include <stdio.h>
-#if defined(ANDROID)
+#if defined(ANDROID) || defined(OS_POSIX)
 #include <unistd.h>
 #endif