diff --git a/src/movie.h b/src/movie.h
index ee5aa212..cdccf587 100644
--- a/src/movie.h
+++ b/src/movie.h
@@ -5,6 +5,7 @@
 #include <map>
 #include <string>
 #include <ostream>
+#include <stdlib.h>
 
 #include "input/zapper.h"
 #include "utils/guid.h"