diff --git a/gtk/gtkwidgetpath.c b/gtk/gtkwidgetpath.c
index 092ae6df09..0c309d3d8d 100644
--- a/gtk/gtkwidgetpath.c
+++ b/gtk/gtkwidgetpath.c
@@ -217,6 +217,8 @@ gtk_widget_path_unref (GtkWidgetPath *path)
       elem = &g_array_index (path->elems, GtkPathElement, i);
 
       gtk_css_node_declaration_unref (elem->decl);
+      if (elem->siblings)
+        gtk_widget_path_unref (elem->siblings);
     }
 
   g_array_free (path->elems, TRUE);