diff --git a/scss/_variables.scss b/scss/_variables.scss
index f7fe80a07..64415dee8 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -549,7 +549,7 @@ $list-group-link-hover-color:   $list-group-link-color !default;
 $list-group-link-heading-color: #333 !default;
 
 
-// Thumbnails
+// Image thumbnails
 
 $thumbnail-padding:           .25rem !default;
 $thumbnail-bg:                $body-bg !default;