diff --git a/src/css/ingame_hud/buildings_toolbar.scss b/src/css/ingame_hud/buildings_toolbar.scss
index 8813757d..54205d64 100644
--- a/src/css/ingame_hud/buildings_toolbar.scss
+++ b/src/css/ingame_hud/buildings_toolbar.scss
@@ -109,14 +109,6 @@
                     }
                 }
             }
-
-            &.puzzle-lock {
-                display: inline;
-                background-image: uiResource("res/ui/unlocked-building.png");
-                background-size: 50%;
-                background-position-x: right;
-                background-position-y: top;
-            }
         }
     }
 }