diff --git a/include/prototypes.h b/include/prototypes.h
index 44aa7843..f251d424 100644
--- a/include/prototypes.h
+++ b/include/prototypes.h
@@ -38,6 +38,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 #include "item.h"
 #include "nsc.h"
 #include "misc.h"