diff --git a/less/forms.less b/less/forms.less
index fad9f15e5a..f4e8c996d9 100644
--- a/less/forms.less
+++ b/less/forms.less
@@ -77,7 +77,7 @@ input[type="checkbox"]:focus {
 // See https://github.com/twbs/bootstrap/issues/8350 for more.
 input[type="number"] {
   &::-webkit-outer-spin-button,
-  &::-webkit-inner-spin-button  {
+  &::-webkit-inner-spin-button {
     height: auto;
   }
 }