diff --git a/libgnucash/gnc-module/test/test-dynload.c b/libgnucash/gnc-module/test/test-dynload.c
index 8732dacf58..d37751b20d 100644
--- a/libgnucash/gnc-module/test/test-dynload.c
+++ b/libgnucash/gnc-module/test/test-dynload.c
@@ -26,6 +26,7 @@
 
 #include <config.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <gmodule.h>
 #include <unittest-support.h>