diff --git a/assets/styles/objects/_form.scss b/assets/styles/objects/_form.scss
index 1ae826f..0605eff 100644
--- a/assets/styles/objects/_form.scss
+++ b/assets/styles/objects/_form.scss
@@ -65,7 +65,6 @@ $checkbox-icon-color: $input-icon-color;
     padding-left: ($checkbox + rem(10px));
 
     &::before, &::after {
-        @extend .o-input;
 
         position: absolute;
         top: 50%;
@@ -78,6 +77,10 @@ $checkbox-icon-color: $input-icon-color;
         content: "";
     }
 
+    &::before {
+        background-color: $white;
+    }
+
     &::after {
         border-color: transparent;
         background-color: transparent;