diff --git a/assets/src/ba_data/python/bastd/ui/gather/privatetab.py b/assets/src/ba_data/python/bastd/ui/gather/privatetab.py
index 839ba787..33858e6e 100644
--- a/assets/src/ba_data/python/bastd/ui/gather/privatetab.py
+++ b/assets/src/ba_data/python/bastd/ui/gather/privatetab.py
@@ -166,7 +166,7 @@ class PrivateGatherTab(GatherTab):
         elif hcfg.session_type == 'teams':
             sessiontype = ba.DualTeamSession
         else:
-            raise RuntimeError('fInvalid sessiontype: {hcfg.session_type}')
+            raise RuntimeError(f'Invalid sessiontype: {hcfg.session_type}')
         pvars = PlaylistTypeVars(sessiontype)
 
         playlist_name = ba.app.config.get(