diff --git a/desmume/src/movie.h b/desmume/src/movie.h
index e428efa3d..52f85da4b 100644
--- a/desmume/src/movie.h
+++ b/desmume/src/movie.h
@@ -6,6 +6,7 @@
 #include <string>
 #include <ostream>
 #include <istream>
+#include <stdlib.h>
 
 #include "utils/guid.h"
 #include "utils/md5.h"