diff --git a/gtk/theme/HighContrast/_common.scss b/gtk/theme/HighContrast/_common.scss
index aecf695804..68661cce3d 100644
--- a/gtk/theme/HighContrast/_common.scss
+++ b/gtk/theme/HighContrast/_common.scss
@@ -2760,7 +2760,7 @@ row.activatable {
  *************/
 
 expander {
-  & arrow {
+  title > arrow {
     min-width: 16px;
     min-height: 16px;
     -gtk-icon-source: -gtk-icontheme('pan-end-symbolic');