diff --git a/app/core/gimpchunkiterator.c b/app/core/gimpchunkiterator.c
index 1cf7da1459..5e3243b2bb 100644
--- a/app/core/gimpchunkiterator.c
+++ b/app/core/gimpchunkiterator.c
@@ -21,6 +21,8 @@
 
 #include "config.h"
 
+#include <stdlib.h>
+
 #include <cairo.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>
 #include <gegl.h>