diff --git a/app/assets/stylesheets/common/base/magnific-popup.scss b/app/assets/stylesheets/common/base/magnific-popup.scss
index 8c0a5861c..7427e863f 100644
--- a/app/assets/stylesheets/common/base/magnific-popup.scss
+++ b/app/assets/stylesheets/common/base/magnific-popup.scss
@@ -510,6 +510,13 @@ button {
     color: $caption-title-color;
     word-wrap: break-word;
     padding-right: 36px; // leave some space for counter at right side
+
+    // add the download icon
+    a.image-source-link:before {
+      content: "\f019";
+      font-family: FontAwesome;
+      padding-right: 5px;
+    }
   }
 
   .mfp-image-holder {