diff --git a/scss/_images.scss b/scss/_images.scss
index 81e823ca02..60e8fc9b57 100644
--- a/scss/_images.scss
+++ b/scss/_images.scss
@@ -22,7 +22,7 @@
   border: $thumbnail-border-width solid $thumbnail-border-color;
   border-radius: $thumbnail-border-radius;
   transition: all .2s ease-in-out;
-  @include box-shadow(0 1px 2px rgba(0,0,0,.075));
+  @include box-shadow($thumbnail-box-shadow);
 
   // Keep them at most 100% wide
   @include img-fluid(inline-block);
diff --git a/scss/_variables.scss b/scss/_variables.scss
index 0cfa0d8bde..a09a79a7cc 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -623,6 +623,7 @@ $thumbnail-bg:                $body-bg !default;
 $thumbnail-border-width:      $border-width !default;
 $thumbnail-border-color:      #ddd !default;
 $thumbnail-border-radius:     $border-radius !default;
+$thumbnail-box-shadow:        0 1px 2px rgba(0,0,0,.075) !default;
 
 
 // Breadcrumbs