diff --git a/schemas/v3.1/schema.json b/schemas/v3.1/schema.json
index a12eaffcc2..8788428d33 100644
--- a/schemas/v3.1/schema.json
+++ b/schemas/v3.1/schema.json
@@ -772,7 +772,7 @@
         }
       },
       "patternProperties": {
-        "^[1-5](?:[0-9]{2}|XX)$":
+        "^[1-5](?:[0-9]{2}|XX)$": {
           "$ref": "#/$defs/response-or-reference"
         }
       },