diff --git a/src/platform_win32.cc b/src/platform_win32.cc
index af8f7e7eb5..c3831c1c4a 100644
--- a/src/platform_win32.cc
+++ b/src/platform_win32.cc
@@ -2,6 +2,7 @@
 #include "platform.h"
 #include "platform_win32.h"
 
+#include <errno.h> // for MAXPATHLEN
 #include <sys/param.h> // for MAXPATHLEN
 #include <unistd.h> // getpagesize
 #include <windows.h>