diff --git a/scss/forms/_form-control.scss b/scss/forms/_form-control.scss
index 307e31aa60..c80345fac6 100644
--- a/scss/forms/_form-control.scss
+++ b/scss/forms/_form-control.scss
@@ -44,10 +44,10 @@
     border-color: var(--#{$prefix}input-focus-border-color, $input-focus-border-color);
     outline: 0;
     @if $enable-shadows {
-      @include box-shadow($input-box-shadow, $input-focus-box-shadow);
+      @include box-shadow($input-box-shadow, var(--#{$prefix}input-focus-box-shadow, $input-focus-box-shadow));
     } @else {
       // Avoid using mixin so we can pass custom focus shadow properly
-      box-shadow: $input-focus-box-shadow;
+      box-shadow: var(--#{$prefix}input-focus-box-shadow, $input-focus-box-shadow);
     }
   }