diff --git a/gtk/theme/HighContrast/_common.scss b/gtk/theme/HighContrast/_common.scss
index f1f386ed87..5926be643d 100644
--- a/gtk/theme/HighContrast/_common.scss
+++ b/gtk/theme/HighContrast/_common.scss
@@ -120,7 +120,8 @@ textview text,
   }
 }
 
-.rubberband {
+.rubberband,
+rubberband {
   border: 1px solid $selected_bg_color;
   background-color: transparentize($selected_bg_color,0.8);
 }
@@ -961,7 +962,7 @@ treeview.view {
   border-left-color: mix($fg_color, $base_color, 50%); // this is actually the tree lines color,
   border-top-color: $bg_color;                         // while this is the grid lines color, better then nothing
 
-  &.rubberband { @extend .rubberband; } // to avoid borders being overridden by the previously set props
+  &.rubberband { @extend rubberband; } // to avoid borders being overridden by the previously set props
 
   &:selected { border-radius: 0; } // rest border radius in lists
 
diff --git a/gtk/theme/HighContrast/gtk.css b/gtk/theme/HighContrast/gtk.css
index f028d8af6f..347b925e97 100644
--- a/gtk/theme/HighContrast/gtk.css
+++ b/gtk/theme/HighContrast/gtk.css
@@ -106,7 +106,9 @@ textview text,
     color: #000;
     background-color: #fff; }
 
-.rubberband, treeview.view.rubberband {
+.rubberband,
+rubberband,
+treeview.view.rubberband {
   border: 1px solid #000;
   background-color: rgba(0, 0, 0, 0.2); }