diff --git a/assets/styles/components/_buttons.scss b/assets/styles/components/_buttons.scss
index 31df660..c0ac9bf 100644
--- a/assets/styles/components/_buttons.scss
+++ b/assets/styles/components/_buttons.scss
@@ -25,7 +25,7 @@
     border: 1px solid $brand-colour;
   }
 
-  .is-disabled,
+  &.is-disabled,
   &:disabled {
     pointer-events: none;
     opacity: .65;