diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9257a061dd..def59df365 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -165,6 +165,7 @@ add_files(
     engine_func.h
     engine_gui.cpp
     engine_gui.h
+    engine_override.h
     engine_type.h
     error.h
     error_gui.cpp
diff --git a/src/console_cmds.cpp b/src/console_cmds.cpp
index 6287607115..58a168dd53 100644
--- a/src/console_cmds.cpp
+++ b/src/console_cmds.cpp
@@ -40,6 +40,7 @@
 #include "newgrf_profiling.h"
 #include "console_func.h"
 #include "engine_base.h"
+#include "engine_override.h"
 #include "road.h"
 #include "rail.h"
 #include "game/game.hpp"
diff --git a/src/engine.cpp b/src/engine.cpp
index a0df90cea5..b331ddb7f8 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -25,6 +25,7 @@
 #include "engine_gui.h"
 #include "engine_func.h"
 #include "engine_base.h"
+#include "engine_override.h"
 #include "company_base.h"
 #include "vehicle_func.h"
 #include "articulated_vehicles.h"
diff --git a/src/engine_base.h b/src/engine_base.h
index 039c39b5fd..8474918a17 100644
--- a/src/engine_base.h
+++ b/src/engine_base.h
@@ -215,28 +215,6 @@ struct Engine : EnginePool::PoolItem<&_engine_pool> {
 	}
 };
 
-struct EngineIDMapping {
-	uint32_t grfid;          ///< The GRF ID of the file the entity belongs to
-	uint16_t internal_id;    ///< The internal ID within the GRF file
-	VehicleType type;        ///< The engine type
-	uint8_t  substitute_id;  ///< The (original) entity ID to use if this GRF is not available (currently not used)
-};
-
-/**
- * Stores the mapping of EngineID to the internal id of newgrfs.
- * Note: This is not part of Engine, as the data in the EngineOverrideManager and the engine pool get resetted in different cases.
- */
-struct EngineOverrideManager : std::vector<EngineIDMapping> {
-	static const uint NUM_DEFAULT_ENGINES; ///< Number of default entries
-
-	void ResetToDefaultMapping();
-	EngineID GetID(VehicleType type, uint16_t grf_local_id, uint32_t grfid);
-
-	static bool ResetToCurrentNewGRFConfig();
-};
-
-extern EngineOverrideManager _engine_mngr;
-
 inline const EngineInfo *EngInfo(EngineID e)
 {
 	return &Engine::Get(e)->info;
diff --git a/src/engine_override.h b/src/engine_override.h
new file mode 100644
index 0000000000..8e6822a796
--- /dev/null
+++ b/src/engine_override.h
@@ -0,0 +1,40 @@
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file engine_override.h Engine override functionality. */
+
+#ifndef ENGINE_OVERRIDE_H
+#define ENGINE_OVERRIDE_H
+
+#include "engine_type.h"
+#include "vehicle_type.h"
+
+#include <vector>
+
+struct EngineIDMapping {
+	uint32_t grfid;          ///< The GRF ID of the file the entity belongs to
+	uint16_t internal_id;    ///< The internal ID within the GRF file
+	VehicleType type;        ///< The engine type
+	uint8_t  substitute_id;  ///< The (original) entity ID to use if this GRF is not available (currently not used)
+};
+
+/**
+ * Stores the mapping of EngineID to the internal id of newgrfs.
+ * Note: This is not part of Engine, as the data in the EngineOverrideManager and the engine pool get resetted in different cases.
+ */
+struct EngineOverrideManager : std::vector<EngineIDMapping> {
+	static const uint NUM_DEFAULT_ENGINES; ///< Number of default entries
+
+	void ResetToDefaultMapping();
+	EngineID GetID(VehicleType type, uint16_t grf_local_id, uint32_t grfid);
+
+	static bool ResetToCurrentNewGRFConfig();
+};
+
+extern EngineOverrideManager _engine_mngr;
+
+#endif /* ENGINE_BASE_H */
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index b522f15053..dffab5a9c9 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -18,6 +18,7 @@
 #include "fileio_func.h"
 #include "engine_func.h"
 #include "engine_base.h"
+#include "engine_override.h"
 #include "bridge.h"
 #include "town.h"
 #include "newgrf_engine.h"
diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp
index e01a781e22..b0c997a729 100644
--- a/src/newgrf_engine.cpp
+++ b/src/newgrf_engine.cpp
@@ -29,6 +29,7 @@
 #include "newgrf_extension.h"
 #include "newgrf_analysis.h"
 #include "newgrf_dump.h"
+#include "engine_override.h"
 
 #include "safeguards.h"
 
diff --git a/src/openttd.cpp b/src/openttd.cpp
index 6cfb3aaf25..166409e10a 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -53,6 +53,7 @@
 #include "station_base.h"
 #include "crashlog.h"
 #include "engine_func.h"
+#include "engine_override.h"
 #include "core/random_func.hpp"
 #include "rail_gui.h"
 #include "road_gui.h"
diff --git a/src/saveload/engine_sl.cpp b/src/saveload/engine_sl.cpp
index e5ab5e7239..cde7bd5575 100644
--- a/src/saveload/engine_sl.cpp
+++ b/src/saveload/engine_sl.cpp
@@ -13,6 +13,7 @@
 #include "compat/engine_sl_compat.h"
 
 #include "../engine_base.h"
+#include "../engine_override.h"
 #include "../string_func.h"
 #include <vector>
 
diff --git a/src/settings.cpp b/src/settings.cpp
index 3c0c52cfdd..5b9667446b 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -79,6 +79,7 @@
 #include "statusbar_gui.h"
 #include "graph_gui.h"
 #include "string_func_extra.h"
+#include "engine_override.h"
 
 #include "void_map.h"
 #include "station_base.h"
diff --git a/src/terraform_gui.cpp b/src/terraform_gui.cpp
index 7e17f60a12..4e8e7d09c5 100644
--- a/src/terraform_gui.cpp
+++ b/src/terraform_gui.cpp
@@ -30,6 +30,7 @@
 #include "object.h"
 #include "hotkeys.h"
 #include "engine_base.h"
+#include "engine_override.h"
 #include "terraform_gui.h"
 #include "cheat_func.h"
 #include "town_gui.h"