diff --git a/src/css/ingame_hud/buildings_toolbar.scss b/src/css/ingame_hud/buildings_toolbar.scss
index cbea22bb..4023f955 100644
--- a/src/css/ingame_hud/buildings_toolbar.scss
+++ b/src/css/ingame_hud/buildings_toolbar.scss
@@ -41,12 +41,24 @@
                     @include S(height, 22px);
                     background-size: 45%;
                 }
-
                 &:not(.unlocked) {
                     &::before {
                         background-size: #{D(13px)};
                     }
                 }
+                &.unlocked {
+                    .puzzle-lock {
+                        & {
+                            /* @load-async */
+                            background: uiResource("locked_building.png") center center / #{D(11px)} #{D(
+                                    11px
+                                )} no-repeat;
+                        }
+
+                        @include S(margin-left, 14px);
+                        bottom: 67px;
+                    }
+                }
             }
         }