diff --git a/src/graph_gui.cpp b/src/graph_gui.cpp
index 10d7e1c495..e705e3749a 100644
--- a/src/graph_gui.cpp
+++ b/src/graph_gui.cpp
@@ -1402,7 +1402,9 @@ struct PerformanceRatingDetailWindow : Window {
 		}
 
 		/* Make sure the widget is lowered */
-		this->LowerWidget(WID_PRD_COMPANY_FIRST + this->company);
+		if (this->company != INVALID_COMPANY) {
+			this->LowerWidget(WID_PRD_COMPANY_FIRST + this->company);
+		}
 	}
 };