diff --git a/f.c b/f.c
index 18c3382..c6a983c 100644
--- a/f.c
+++ b/f.c
@@ -26,6 +26,7 @@ void TEST_FREE(void *p)
 #define free   TEST_FREE
 int f(void)
 {
+	malloc(16);
 	free(malloc(16));
 	free(malloc(32));
 	free(malloc(48));