diff --git a/scss/_forms.scss b/scss/_forms.scss
index 7055cad231..35c9af7ffb 100644
--- a/scss/_forms.scss
+++ b/scss/_forms.scss
@@ -257,7 +257,7 @@ input[type="checkbox"] {
   padding-right: ($input-padding-x * 3);
   background-repeat: no-repeat;
   background-position: center right ($input-height * .25);
-  background-size: ($input-height * .5) ($input-height * .50);
+  background-size: ($input-height * .5) ($input-height * .5);
 }
 
 // Form validation states