diff --git a/scss/mixins/_progress.scss b/scss/mixins/_progress.scss
index 802e179a413e..e174141dc8cd 100644
--- a/scss/mixins/_progress.scss
+++ b/scss/mixins/_progress.scss
@@ -9,6 +9,7 @@
     background-color: $color;
   }
 
+  // IE9
   @media screen and (min-width:0\0) {
     .progress-bar {
       background-color: $color;