diff --git a/src/fontra/core/fonthandler.py b/src/fontra/core/fonthandler.py
index 5698ebf17..5db9ed495 100644
--- a/src/fontra/core/fonthandler.py
+++ b/src/fontra/core/fonthandler.py
@@ -290,6 +290,7 @@ async def deleteBackgroundImage(
         if not hasattr(self.backend, "deleteBackgroundImage"):
             return None
         await self.backend.deleteBackgroundImage(imageIdentifier)
+        return
 
     def _getClientData(self, connection, key, default=None):
         return self.clientData[connection.clientUUID].get(key, default)