diff --git a/src/themes/default/modules/progress.variables b/src/themes/default/modules/progress.variables
index af43b6b71..ea365deec 100644
--- a/src/themes/default/modules/progress.variables
+++ b/src/themes/default/modules/progress.variables
@@ -87,7 +87,8 @@
 --------------------*/
 
 /* Attached */
-@attachedHeight: 0.25em;
+@attachedBackground: transparent;
+@attachedHeight: 3px;
 @attachedBorderRadius: @borderRadius;
 
 /* Inverted */