diff --git a/client/app/styles/main.scss b/client/app/styles/main.scss
index 44977c5e10..ba7b187895 100644
--- a/client/app/styles/main.scss
+++ b/client/app/styles/main.scss
@@ -1014,7 +1014,7 @@ h2 {
 .details-wrapper .node-details-table {
   &-node {
     &:hover, &.selected {
-      background-color: lighten(@background-color, 5%);
+      background-color: lighten($background-color, 5%);
     }
   }
 }