diff --git a/css/styles.css b/css/styles.css
index 54d0d984..82ca00b4 100644
--- a/css/styles.css
+++ b/css/styles.css
@@ -26,10 +26,10 @@ radio {
 .osd list {
   background: none;
 }
-.gtk41 trough highlight {
+.gtk402 trough highlight {
   border-color: transparent;
 }
-.gtk41 .osd trough highlight {
+.gtk402 .osd trough highlight {
   border-color: inherit;
 }
 
diff --git a/src/appBase.js b/src/appBase.js
index f1e7bb19..bfd4fc39 100644
--- a/src/appBase.js
+++ b/src/appBase.js
@@ -27,8 +27,8 @@ class ClapperAppBase extends Gtk.Application
             title: Misc.appName,
         });
 
-        if(Gtk.MINOR_VERSION > 0)
-            window.add_css_class('gtk41');
+        if(Gtk.MINOR_VERSION > 0 || Gtk.MICRO_VERSION > 1)
+            window.add_css_class('gtk402');
 
         if(!settings.get_boolean('render-shadows'))
             window.add_css_class('gpufriendly');