diff --git a/base/fs_unix.h b/base/fs_unix.h
index f57b6b962..613fee507 100644
--- a/base/fs_unix.h
+++ b/base/fs_unix.h
@@ -10,6 +10,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <cerrno>
 #include <climits>              // Required for PATH_MAX
 #include <cstdio>               // Required for rename()
 #include <cstdlib>