diff --git a/scss/_variables.scss b/scss/_variables.scss
index 0485ffe7c..221d9573d 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -504,6 +504,14 @@ $box-shadow-inset:            inset 0 1px 2px rgba($black, .075) !default;
 $component-active-color:      $white !default;
 $component-active-bg:         $primary !default;
 
+// scss-docs-start focus-ring-variables
+$focus-ring-width:      .25rem !default;
+$focus-ring-opacity:    .25 !default;
+$focus-ring-color:      rgba($primary, $focus-ring-opacity) !default;
+$focus-ring-blur:       0 !default;
+$focus-ring-box-shadow: 0 0 $focus-ring-blur $focus-ring-width $focus-ring-color !default;
+// scss-docs-end focus-ring-variables
+
 // scss-docs-start caret-variables
 $caret-width:                 .3em !default;
 $caret-vertical-align:        $caret-width * .85 !default;