diff --git a/themes/Clearlooks/gtk-2.0/gtkrc b/themes/Clearlooks/gtk-2.0/gtkrc
index 7c41554..7750557 100644
--- a/themes/Clearlooks/gtk-2.0/gtkrc
+++ b/themes/Clearlooks/gtk-2.0/gtkrc
@@ -422,3 +422,13 @@ widget_class "*<EelEditableLabel>" style "fg_is_text_color_workaround"
 
 # See the documentation of the style.
 widget_class "EShellWindow.GtkVBox.BonoboDock.BonoboDockBand.BonoboDockItem*" style "evo_new_button_workaround"
+
+style "theme-panel-button" {
+    xthickness = 0
+    ythickness = 0
+}
+
+widget "*slab-main-menu-panel-button-bottom*" style "theme-panel-button"
+widget "*slab-main-menu-panel-button-top*" style "theme-panel-button"
+widget "*slab-main-menu-panel-button-left*" style "theme-panel-button"
+widget "*slab-main-menu-panel-button-right*" style "theme-panel-button"