diff --git a/changelogs/client_server/newsfragments/1353.clarification b/changelogs/client_server/newsfragments/1353.clarification
new file mode 100644
index 00000000..fa9316da
--- /dev/null
+++ b/changelogs/client_server/newsfragments/1353.clarification
@@ -0,0 +1 @@
+Add missing description to m.call.answer schema.
diff --git a/data/event-schemas/schema/m.call.answer.yaml b/data/event-schemas/schema/m.call.answer.yaml
index 9d98dd7d..e84cf6f8 100644
--- a/data/event-schemas/schema/m.call.answer.yaml
+++ b/data/event-schemas/schema/m.call.answer.yaml
@@ -31,7 +31,7 @@
                 },
                 "version": {
                     "type": "number",
-                    "description": ""
+                    "description": "The version of the VoIP specification this messages adheres to. This specification is version 0."
                 }
             },
             "required": ["call_id", "answer", "version"]