diff --git a/res/themes/dark/css/_dark.scss b/res/themes/dark/css/_dark.scss
index b4d1fc9fcc..612b8e03bd 100644
--- a/res/themes/dark/css/_dark.scss
+++ b/res/themes/dark/css/_dark.scss
@@ -258,7 +258,7 @@ $composer-shadow-color: rgba(0, 0, 0, 0.28);
 // markdown overrides:
 .mx_EventTile_content .markdown-body pre:hover {
     border-color: #808080 !important; // inverted due to rules below
-    scrollbar-color: auto;
+    scrollbar-color: rgba(0, 0, 0, 0.2) transparent; // copied from light theme due to inversion below
 }
 .mx_EventTile_content .markdown-body {
     pre, code {