diff --git a/src/mini/_progress.scss b/src/mini/_progress.scss
index 4f7c954..f5ab15e 100644
--- a/src/mini/_progress.scss
+++ b/src/mini/_progress.scss
@@ -67,7 +67,7 @@ progress {
   }
   // Background color on webkit browser
   &::-webkit-progress-bar {
-    background: var(#{$progress-back-color});
+    background: var(#{$progress-back-color-var});
   }
   // Foreground color on Firefox
   &::-moz-progress-bar {