diff --git a/lms/static/sass/features/_course-outline.scss b/lms/static/sass/features/_course-outline.scss
index bc02f42754..7ea0b7e791 100644
--- a/lms/static/sass/features/_course-outline.scss
+++ b/lms/static/sass/features/_course-outline.scss
@@ -48,7 +48,7 @@
             border: 1px solid $lms-active-color;
 
             .resume-right {
-              float: right;
+              @include float(right);
             }
           }
         }