diff --git a/src/autoreplace_gui.cpp b/src/autoreplace_gui.cpp
--- a/src/autoreplace_gui.cpp
+++ b/src/autoreplace_gui.cpp
@@ -402,7 +402,7 @@ public:
 		this->SetDirty();
 	}
 
-	virtual void OnResize(Point new_size, Point delta) {
+	virtual void OnResize(Point delta) {
 		this->vscroll.cap  += delta.y / (int)this->resize.step_height;
 		this->vscroll2.cap += delta.y / (int)this->resize.step_height;