diff --git a/src/depot_gui.cpp b/src/depot_gui.cpp
index e001f2fedb..9eeb51011c 100644
--- a/src/depot_gui.cpp
+++ b/src/depot_gui.cpp
@@ -460,11 +460,9 @@ struct DepotWindow : Window {
 		ym = (y - matrix_widget->pos_y) % this->resize.step_height;
 
 		int row = this->vscroll->GetScrolledRowFromWidget(y, this, WID_D_MATRIX);
-		if (row == INT_MAX) return MODE_ERROR;
-
 		uint pos = (row * this->num_columns) + xt;
 
-		if (this->vehicle_list.size() + this->wagon_list.size() <= pos) {
+		if (row == INT_MAX || this->vehicle_list.size() + this->wagon_list.size() <= pos) {
 			/* Clicking on 'line' / 'block' without a vehicle */
 			if (this->type == VEH_TRAIN) {
 				/* End the dragging */