diff --git a/src/zen/common/styles/zen-theme.css b/src/zen/common/styles/zen-theme.css
index 489790e81..b252a263c 100644
--- a/src/zen/common/styles/zen-theme.css
+++ b/src/zen/common/styles/zen-theme.css
@@ -101,7 +101,7 @@
   ) !important;
   --focus-outline-color: var(--color-accent-primary) !important;
 
-  --toolbarbutton-icon-fill-attention: var(--toolbar-color) !important;
+  --toolbarbutton-icon-fill-attention: var(--toolbar-color, currentColor) !important;
   --toolbarbutton-icon-fill: currentColor !important;
 
   --button-background-color-primary: var(--in-content-primary-button-background) !important;