diff --git a/src/cat/CommandInterface.cpp b/src/cat/CommandInterface.cpp
index 5b454493a..256414173 100644
--- a/src/cat/CommandInterface.cpp
+++ b/src/cat/CommandInterface.cpp
@@ -8,6 +8,7 @@
 #include <iostream>
 #include <string>
 #include <string.h>
+#include <strings.h>
 #include "CommandInterface.h"
 #include "game/GameModel.h"