diff --git a/gtk/resources/theme/gtk-win32-base.css b/gtk/resources/theme/gtk-win32-base.css
index e5c0349bdf..951bd26b0a 100644
--- a/gtk/resources/theme/gtk-win32-base.css
+++ b/gtk/resources/theme/gtk-win32-base.css
@@ -159,6 +159,11 @@ GtkAssistant .sidebar .highlight {
     color: @text_color;
 }
 
+/* Override *:selected { ...} style; affects horizontal-buttons */
+.button:selected {
+  background-color: transparent;
+}
+
 /* Check buttons */
 
 /* Prevent selected check/radio buttons from getting the "selected" blue background */