diff --git a/dev/coccinelle/ist.cocci b/dev/coccinelle/ist.cocci
index 680afbade..4945141b2 100644
--- a/dev/coccinelle/ist.cocci
+++ b/dev/coccinelle/ist.cocci
@@ -60,14 +60,6 @@ struct buffer *b;
 - chunk_memcat(b, \(i.ptr\|istptr(i)\) , \(i.len\|istlen(i)\));
 + chunk_istcat(b, i);
 
-@@
-struct ist i;
-struct buffer *b;
-@@
-
-- chunk_strncat(b, \(i.ptr\|istptr(i)\) , \(i.len\|istlen(i)\));
-+ chunk_istcat(b, i);
-
 @@
 struct ist i;
 @@