diff --git a/src/Core/src/Platform/Gtk/GtkCssExtensions.cs b/src/Core/src/Platform/Gtk/GtkCssExtensions.cs
index d98d3ec89996..4f2abe4a08d3 100644
--- a/src/Core/src/Platform/Gtk/GtkCssExtensions.cs
+++ b/src/Core/src/Platform/Gtk/GtkCssExtensions.cs
@@ -21,7 +21,8 @@ public static string CssMainNode(this Gtk.Widget nativeView)
 				case Gtk.ComboBox box:
 
 				default:
-					mainNode = nativeView.StyleContext.Path.ToString().Split(':')[0];
+					var pathSegments = nativeView.StyleContext.Path.ToString().Split(' ');
+					mainNode = pathSegments[pathSegments.Length - 1].Split(':')[0];
 
 					break;
 			}