diff --git a/src/sfall_metarules.cc b/src/sfall_metarules.cc
index 558645b..8c3e110 100644
--- a/src/sfall_metarules.cc
+++ b/src/sfall_metarules.cc
@@ -1,5 +1,7 @@
 #include "sfall_metarules.h"
 
+#include <string.h>
+
 #include "combat.h"
 #include "debug.h"
 #include "game.h"