diff --git a/res/themes/dark/css/_dark.scss b/res/themes/dark/css/_dark.scss
index a59eec30fbe..c0d0f15613a 100644
--- a/res/themes/dark/css/_dark.scss
+++ b/res/themes/dark/css/_dark.scss
@@ -23,6 +23,9 @@ $light-fg-color: $header-panel-text-secondary-color;
 // used for focusing form controls
 $focus-bg-color: $room-highlight-color;
 
+$mention-user-pill-bg-color: $warning-color;
+$other-user-pill-bg-color: $room-highlight-color;
+
 // informational plinth
 $info-plinth-bg-color: $header-panel-bg-color;
 $info-plinth-fg-color: #888;