diff --git a/contrib/coccinelle/free.cocci b/contrib/coccinelle/free.cocci
index c03ba737e5fafe63218c7023ce8bbd66c47f7dc5..35fb992621ff7c718d91258f4b8ac18a28db17ab 100644
--- a/contrib/coccinelle/free.cocci
+++ b/contrib/coccinelle/free.cocci
@@ -9,3 +9,11 @@ expression E;
 @@
 - if (!E)
   free(E);
+
+@@
+type T;
+T *ptr;
+@@
+- free(ptr);
+- ptr = NULL;
++ FREE_AND_NULL(ptr);