diff --git a/test/ringbuffer-test-utils.c b/test/ringbuffer-test-utils.c
index e372845..0a2c4ff 100644
--- a/test/ringbuffer-test-utils.c
+++ b/test/ringbuffer-test-utils.c
@@ -1,4 +1,5 @@
 #include <stdbool.h>
+#include <stdlib.h>
 
 #include "console-server.h"