diff --git a/skeletons/constr_SET.c b/skeletons/constr_SET.c
index 2ee3b81..4099186 100644
--- a/skeletons/constr_SET.c
+++ b/skeletons/constr_SET.c
@@ -788,7 +788,8 @@
 			break;
 		}
 
-		ASN_DEBUG("Unexpected XML tag in SET");
+		ASN_DEBUG("Unexpected XML tag in SET, expected \"%s\"",
+			xml_tag);
 		break;
 	}