diff --git a/src/subsidy_base.h b/src/subsidy_base.h
--- a/src/subsidy_base.h
+++ b/src/subsidy_base.h
@@ -23,8 +23,8 @@ struct Subsidy : SubsidyPool::PoolItem<&
 	CargoID cargo_type;  ///< Cargo type involved in this subsidy, CT_INVALID for invalid subsidy
 	uint16 remaining;    ///< Remaining months when this subsidy is valid
 	CompanyID awarded;   ///< Subsidy is awarded to this company; INVALID_COMPANY if it's not awarded to anyone
-	SourceType src_type; ///< Source of subsidised path (ST_INDUSTRY or ST_TOWN)
-	SourceType dst_type; ///< Destination of subsidised path (ST_INDUSTRY or ST_TOWN)
+	SourceType src_type; ///< Source of subsidised path (SourceType::Industry or SourceType::Town)
+	SourceType dst_type; ///< Destination of subsidised path (SourceType::Industry or SourceType::Town)
 	SourceID src;        ///< Index of source. Either TownID or IndustryID
 	SourceID dst;        ///< Index of destination. Either TownID or IndustryID