1 files changed, 1 insertions, 0 deletions
diff --git a/window.c b/window.c
index cff9fa3..52d868f 100644
--- a/window.c
+++ b/window.c
@@ -4,6 +4,7 @@
 #include <gdk/gdkx.h>
 #include <libnul.h>
 #include <errno.h>
+#include <stdlib.h>
 #include "siv.h"
 
 #define MIN_ZOOM	-80