diff --git a/src/bin/keymap/main.cpp b/src/bin/keymap/main.cpp
index 66e29841f6..1adb6e68bf 100644
--- a/src/bin/keymap/main.cpp
+++ b/src/bin/keymap/main.cpp
@@ -9,6 +9,7 @@
 
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "Keymap.h"