diff --git a/src/town_cmd.h b/src/town_cmd.h
--- a/src/town_cmd.h
+++ b/src/town_cmd.h
@@ -16,7 +16,7 @@
 
 enum TownEffect : byte;
 
-CommandCost CmdFoundTown(DoCommandFlag flags, TileIndex tile, TownSize size, bool city, TownLayout layout, bool random_location, uint32 townnameparts, const std::string &text);
+std::tuple<CommandCost, TownID> CmdFoundTown(DoCommandFlag flags, TileIndex tile, TownSize size, bool city, TownLayout layout, bool random_location, uint32 townnameparts, const std::string &text);
 CommandCost CmdRenameTown(DoCommandFlag flags, TownID town_id, const std::string &text);
 CommandCost CmdDoTownAction(DoCommandFlag flags, TownID town_id, uint8 action);
 CommandCost CmdTownGrowthRate(DoCommandFlag flags, TownID town_id, uint16 growth_rate);
@@ -37,6 +37,6 @@ DEF_CMD_TRAIT(CMD_EXPAND_TOWN,      CmdE
 DEF_CMD_TRAIT(CMD_DELETE_TOWN,      CmdDeleteTown,     CMD_OFFLINE,              CMDT_LANDSCAPE_CONSTRUCTION)
 
 CommandCallback CcFoundTown;
-CommandCallback CcFoundRandomTown;
+void CcFoundRandomTown(Commands cmd, const CommandCost &result, TownID town_id);
 
 #endif /* TOWN_CMD_H */