diff --git a/src/script/api/script_types.hpp b/src/script/api/script_types.hpp
index ca525a9ede..9deba0681d 100644
--- a/src/script/api/script_types.hpp
+++ b/src/script/api/script_types.hpp
@@ -85,27 +85,32 @@
 #include "../../tile_type.h"
 #include <squirrel.h>
 
-/* Define all types here, so we don't have to include the whole _type.h maze */
-typedef uint BridgeType;     ///< Internal name, not of any use for you.
-typedef uint8_t CargoID;        ///< The ID of a cargo.
-class CommandCost;           ///< The cost of a command.
+/* Define all types here, so they are added to the API docs. */
+typedef uint BridgeID;         ///< The ID of a bridge type.
+typedef uint8_t CargoID;       ///< The ID of a cargo.
 typedef uint16_t EngineID;     ///< The ID of an engine.
 typedef uint16_t GoalID;       ///< The ID of a goal.
 typedef uint16_t GroupID;      ///< The ID of a group.
 typedef uint16_t IndustryID;   ///< The ID of an industry.
 typedef uint8_t IndustryType;  ///< The ID of an industry-type.
-typedef OverflowSafeInt64 Money; ///< Money, stored in a 32bit/64bit safe way. For scripts money is always in pounds.
+#ifdef DOXYGEN_API
+typedef int64_t Money;         ///< Money, stored in a 32bit/64bit safe way. For scripts money is always in pounds.
+#else
+typedef OverflowSafeInt64 Money;
+#endif /* DOXYGEN_API */
+typedef uint16_t ObjectType;   ///< The ID of an object-type.
 typedef uint16_t SignID;       ///< The ID of a sign.
 typedef uint16_t StationID;    ///< The ID of a station.
 typedef uint32_t StringID;     ///< The ID of a string.
 typedef uint16_t SubsidyID;    ///< The ID of a subsidy.
 typedef uint16_t StoryPageID;  ///< The ID of a story page.
 typedef uint16_t StoryPageElementID; ///< The ID of a story page element.
+#ifdef DOXYGEN_API
+typedef uint32_t TileIndex;    ///< The ID of a map location.
+#endif /* DOXYGEN_API */
 typedef uint16_t TownID;       ///< The ID of a town.
 typedef uint32_t VehicleID;    ///< The ID of a vehicle.
 
-/* Types we defined ourself, as the OpenTTD core doesn't have them (yet) */
 typedef uint ScriptErrorType;///< The types of errors inside the script framework.
-typedef BridgeType BridgeID; ///< The ID of a bridge.
 
 #endif /* SCRIPT_TYPES_HPP */