diff --git a/ts/editor/legacy.scss b/ts/editor/legacy.scss
index 4fcbdb3f1..ef8c137cb 100644
--- a/ts/editor/legacy.scss
+++ b/ts/editor/legacy.scss
@@ -17,3 +17,6 @@
     width: calc(var(--toolbar-size) - 12px);
     height: calc(var(--toolbar-size) - 12px);
 }
+.night-mode .topbut {
+    filter: invert(1);
+}