diff --git a/changelog.d/12483.misc b/changelog.d/12483.misc
new file mode 100644
index 000000000000..88c6e3e465c8
--- /dev/null
+++ b/changelog.d/12483.misc
@@ -0,0 +1 @@
+Fix grammatical error in federation error response when the room version of a room is unknown.
diff --git a/synapse/storage/databases/main/state.py b/synapse/storage/databases/main/state.py
index eba35f37000d..7a1b013fa3ac 100644
--- a/synapse/storage/databases/main/state.py
+++ b/synapse/storage/databases/main/state.py
@@ -130,7 +130,7 @@ def get_room_version_id_txn(self, txn: LoggingTransaction, room_id: str) -> str:
         )
 
         if room_version is None:
-            raise NotFoundError("Could not room_version for %s" % (room_id,))
+            raise NotFoundError("Could not find room_version for %s" % (room_id,))
 
         return room_version