diff --git a/src/interface.py b/src/interface.py
index 2c737a337..4d05455d0 100644
--- a/src/interface.py
+++ b/src/interface.py
@@ -692,7 +692,8 @@ class DelugeGTK:
         preferences_dialog.show(self, self.window)
 
     def show_preferences_dialog_clicked(self, arg=None):
-        if self.config.get("lock_tray") == True:
+        if self.config.get("enable_system_tray") and \
+           self.config.get("lock_tray"):
             self.unlock_tray("prefwinshow")
         else:
             self.show_preferences_dialog()