diff --git a/scss/_progress.scss b/scss/_progress.scss
index 148c3815e8..732365c526 100644
--- a/scss/_progress.scss
+++ b/scss/_progress.scss
@@ -3,7 +3,7 @@
 // scss-docs-start progress-keyframes
 @if $enable-transitions {
   @keyframes progress-bar-stripes {
-    0% { background-position-x: $progress-height; }
+    0% { background-position-x: var(--#{$prefix}progress-height); }
   }
 }
 // scss-docs-end progress-keyframes