--- /usr/lib/gedit/plugins/latex/windowactivatable.py
+++ /usr/lib/gedit/plugins/latex/windowactivatable.py
@@ -415,7 +415,7 @@
             except KeyError:
                 pass
 
-        if extension:
+        if extension in latex_extensions:
             self.show_toolbar()
         else:
             self.hide_toolbar()