diff --git a/lib/rsa/rsa-sign.c b/lib/rsa/rsa-sign.c
index 580c744709..621ddc4350 100644
--- a/lib/rsa/rsa-sign.c
+++ b/lib/rsa/rsa-sign.c
@@ -4,7 +4,7 @@
  */
 
 #include "mkimage.h"
-#include <malloc.h>
+#include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <image.h>