diff --git a/rogue4/wizard.c b/rogue4/wizard.c
index 3c57cd3..c01a0ed 100644
--- a/rogue4/wizard.c
+++ b/rogue4/wizard.c
@@ -8,6 +8,7 @@
 
 #include <curses.h>
 #include <ctype.h>
+#include <stdlib.h>
 #include <string.h>
 #include "rogue.h"