diff --git a/src/widgets/graph_widget.h b/src/widgets/graph_widget.h
--- a/src/widgets/graph_widget.h
+++ b/src/widgets/graph_widget.h
@@ -49,7 +49,8 @@ enum CargoPaymentRatesWidgets {
 	WID_CPR_FOOTER,          ///< Footer.
 	WID_CPR_ENABLE_CARGOES,  ///< Enable cargoes button.
 	WID_CPR_DISABLE_CARGOES, ///< Disable cargoes button.
-	WID_CPR_CARGO_FIRST,     ///< First cargo in the list.
+	WID_CPR_MATRIX,          ///< Cargo list.
+	WID_CPR_MATRIX_SCROLLBAR,///< Cargo list scrollbar.
 };
 
 /** Widget of the #CompanyLeagueWindow class. */