diff --git a/changelog.d/11716.misc b/changelog.d/11716.misc
new file mode 100644
index 000000000..08f731049
--- /dev/null
+++ b/changelog.d/11716.misc
@@ -0,0 +1 @@
+Fix docstring on `add_account_data_for_user`.
\ No newline at end of file
diff --git a/synapse/handlers/account_data.py b/synapse/handlers/account_data.py
index 96273e2f8..bad48713b 100644
--- a/synapse/handlers/account_data.py
+++ b/synapse/handlers/account_data.py
@@ -77,7 +77,7 @@ class AccountDataHandler:
     async def add_account_data_for_user(
         self, user_id: str, account_data_type: str, content: JsonDict
     ) -> int:
-        """Add some account_data to a room for a user.
+        """Add some global account_data for a user.
 
         Args:
             user_id: The user to add a tag for.
diff --git a/synapse/storage/databases/main/account_data.py b/synapse/storage/databases/main/account_data.py
index 32a553fdd..93db71d1b 100644
--- a/synapse/storage/databases/main/account_data.py
+++ b/synapse/storage/databases/main/account_data.py
@@ -450,7 +450,7 @@ class AccountDataWorkerStore(CacheInvalidationWorkerStore):
     async def add_account_data_for_user(
         self, user_id: str, account_data_type: str, content: JsonDict
     ) -> int:
-        """Add some account_data to a room for a user.
+        """Add some global account_data for a user.
 
         Args:
             user_id: The user to add a tag for.