diff --git a/kikit/actionPlugins/panelize.py b/kikit/actionPlugins/panelize.py
index bf19903a..b2113086 100644
--- a/kikit/actionPlugins/panelize.py
+++ b/kikit/actionPlugins/panelize.py
@@ -446,7 +446,7 @@ def OnPanelize(self, event):
                     dlg.Destroy()
                     return
                 panelFile = self.sections["Output"].items["Output file"].getValue()
-                if len(input) == 0:
+                if len(panelFile) == 0:
                     dlg = wx.MessageDialog(
                         None, f"No output file specified", "Error", wx.OK)
                     dlg.ShowModal()