diff --git a/source/libcli/util/asn1.c b/source/libcli/util/asn1.c
index 81ce72bed97..477887b96a6 100644
--- a/source/libcli/util/asn1.c
+++ b/source/libcli/util/asn1.c
@@ -24,7 +24,7 @@
 /* allocate an asn1 structure */
 struct asn1_data *asn1_init(TALLOC_CTX *mem_ctx)
 {
-	struct asn1_data *ret = talloc_zero(NULL, struct asn1_data);
+	struct asn1_data *ret = talloc_zero(mem_ctx, struct asn1_data);
 	if (ret == NULL) {
 		DEBUG(0,("asn1_init failed! out of memory\n"));
 	}