diff --git a/src/theme/theme.base.scss b/src/theme/theme.base.scss
index 4942e809c..9e6103704 100644
--- a/src/theme/theme.base.scss
+++ b/src/theme/theme.base.scss
@@ -608,7 +608,6 @@ body.core-iframe-fullscreen ion-router-outlet {
         --core-header-toolbar-color: white;
         --core-header-toolbar-background: black;
         --core-header-buttons-background: var(--core-header-toolbar-background);
-        --core-header-buttons-background: var(--core-header-toolbar-background);
         --core-header-buttons-color: var(--core-header-toolbar-color);
         --core-header-toolbar-border-width: 0px;