diff --git a/scss/_variables.scss b/scss/_variables.scss
index eaa1649883..a5da4e41d5 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -545,7 +545,7 @@ $form-check-input-checked-bg-repeat:      no-repeat !default;
 $form-check-input-checked-bg-position:    center center !default;
 $form-check-input-checked-bg-size:        1em !default;
 $form-check-input-checked-bg-image:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path fill='none' stroke='#{$form-check-input-checked-color}' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M4 8.5L6.5 11l6-6'/></svg>") !default;
-$form-check-radio-checked-bg-image:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'><circle r='3' fill='#{$form-check-input-checked-color}'/></svg>") !default;
+$form-check-radio-checked-bg-image:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'><circle r='2' fill='#{$form-check-input-checked-color}'/></svg>") !default;
 
 $form-check-input-indeterminate-color:          $component-active-color !default;
 $form-check-input-indeterminate-bg-color:       $component-active-bg !default;