diff --git a/demos/gtk-demo/nodewidget.h b/demos/gtk-demo/nodewidget.h
index 48036265e2..c70513e606 100644
--- a/demos/gtk-demo/nodewidget.h
+++ b/demos/gtk-demo/nodewidget.h
@@ -5,4 +5,4 @@
 #define NODE_TYPE_WIDGET (node_widget_get_type ())
 G_DECLARE_FINAL_TYPE (NodeWidget, node_widget, NODE, WIDGET, GtkWidget)
 
-GtkWidget * node_widget_new       (const char *file);
+GtkWidget * node_widget_new       (const char *resource);