diff --git a/src/fontra/core/fonthandler.py b/src/fontra/core/fonthandler.py
index 82ff819fa..9cc9bd322 100644
--- a/src/fontra/core/fonthandler.py
+++ b/src/fontra/core/fonthandler.py
@@ -174,7 +174,7 @@ async def getBackEndInfo(self, *, connection=None) -> dict:
             self.projectManager, "getSupportedExportFormats"
         ):
             projectManagerFeatures["export-as"] = (
-                self.projectManager.getSupportedExportFormats()
+                self.projectManager.getSupportedExportFormats()  # type: ignore[union-attr]
             )
         return dict(
             name=self.backend.__class__.__name__,