diff --git a/projects/openttd_vs100.vcxproj b/projects/openttd_vs100.vcxproj
index 93efda8949..84ac70efaf 100644
--- a/projects/openttd_vs100.vcxproj
+++ b/projects/openttd_vs100.vcxproj
@@ -578,6 +578,7 @@
     <ClInclude Include="..\src\transport_type.h" />
     <ClInclude Include="..\src\tunnelbridge.h" />
     <ClInclude Include="..\src\unmovable.h" />
+    <ClInclude Include="..\src\unmovable_type.h" />
     <ClInclude Include="..\src\vehicle_base.h" />
     <ClInclude Include="..\src\vehicle_func.h" />
     <ClInclude Include="..\src\vehicle_gui.h" />
diff --git a/projects/openttd_vs100.vcxproj.filters b/projects/openttd_vs100.vcxproj.filters
index 4aa8f28190..c9e5e52953 100644
--- a/projects/openttd_vs100.vcxproj.filters
+++ b/projects/openttd_vs100.vcxproj.filters
@@ -937,6 +937,9 @@
     <ClInclude Include="..\src\unmovable.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\unmovable_type.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\vehicle_base.h">
       <Filter>Header Files</Filter>
     </ClInclude>
diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
index b6697d7508..86dc93a5e5 100644
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -1579,6 +1579,10 @@
 				RelativePath=".\..\src\unmovable.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\unmovable_type.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\vehicle_base.h"
 				>
diff --git a/projects/openttd_vs90.vcproj b/projects/openttd_vs90.vcproj
index a0c31ce147..6fd56503b4 100644
--- a/projects/openttd_vs90.vcproj
+++ b/projects/openttd_vs90.vcproj
@@ -1576,6 +1576,10 @@
 				RelativePath=".\..\src\unmovable.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\unmovable_type.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\vehicle_base.h"
 				>
diff --git a/source.list b/source.list
index 30b6a8aae2..00878b29bd 100644
--- a/source.list
+++ b/source.list
@@ -304,6 +304,7 @@ transparency_gui.h
 transport_type.h
 tunnelbridge.h
 unmovable.h
+unmovable_type.h
 vehicle_base.h
 vehicle_func.h
 vehicle_gui.h
diff --git a/src/unmovable.h b/src/unmovable.h
index 2838d18790..330373cb8f 100644
--- a/src/unmovable.h
+++ b/src/unmovable.h
@@ -14,6 +14,7 @@
 
 #include "economy_func.h"
 #include "strings_type.h"
+#include "unmovable_type.h"
 
 void UpdateCompanyHQ(Company *c, uint score);
 
@@ -40,7 +41,7 @@ struct UnmovableSpec {
 	 * @param index The unmovable type to fetch.
 	 * @return The specification.
 	 */
-	static const UnmovableSpec *Get(int index);
+	static const UnmovableSpec *Get(UnmovableType index);
 
 	/**
 	 * Get the specification associated with a tile.
diff --git a/src/unmovable_cmd.cpp b/src/unmovable_cmd.cpp
index ce9bfb161b..c3983424ee 100644
--- a/src/unmovable_cmd.cpp
+++ b/src/unmovable_cmd.cpp
@@ -35,7 +35,7 @@
 #include "table/sprites.h"
 #include "table/unmovable_land.h"
 
-/* static */ const UnmovableSpec *UnmovableSpec::Get(int index)
+/* static */ const UnmovableSpec *UnmovableSpec::Get(UnmovableType index)
 {
 	assert(index < UNMOVABLE_MAX);
 	return &_original_unmovable[index];
diff --git a/src/unmovable_map.h b/src/unmovable_map.h
index 1b01c56376..7725ac5cb8 100644
--- a/src/unmovable_map.h
+++ b/src/unmovable_map.h
@@ -13,16 +13,7 @@
 #define UNMOVABLE_MAP_H
 
 #include "tile_map.h"
-
-/** Types of unmovable structure */
-enum UnmovableType {
-	UNMOVABLE_TRANSMITTER = 0,    ///< The large antenna
-	UNMOVABLE_LIGHTHOUSE  = 1,    ///< The nice lighthouse
-	UNMOVABLE_STATUE      = 2,    ///< Statue in towns
-	UNMOVABLE_OWNED_LAND  = 3,    ///< Owned land 'flag'
-	UNMOVABLE_HQ          = 4,    ///< HeadQuarter of a player
-	UNMOVABLE_MAX,
-};
+#include "unmovable_type.h"
 
 /**
  * Gets the UnmovableType of the given unmovable tile
diff --git a/src/unmovable_type.h b/src/unmovable_type.h
new file mode 100644
index 0000000000..92f11c31b7
--- /dev/null
+++ b/src/unmovable_type.h
@@ -0,0 +1,27 @@
+/* $Id$ */
+
+/*
+ * 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 unmovable_map.h Types related to unmovable tiles. */
+
+#ifndef UNMOVABLE_TYPE_H
+#define UNMOVABLE_TYPE_H
+
+/** Types of unmovable structure */
+enum UnmovableType {
+	UNMOVABLE_TRANSMITTER = 0,    ///< The large antenna
+	UNMOVABLE_LIGHTHOUSE  = 1,    ///< The nice lighthouse
+	UNMOVABLE_STATUE      = 2,    ///< Statue in towns
+	UNMOVABLE_OWNED_LAND  = 3,    ///< Owned land 'flag'
+	UNMOVABLE_HQ          = 4,    ///< HeadQuarter of a player
+	UNMOVABLE_MAX,
+};
+
+struct UnmovableSpec;
+
+#endif /* UNMOVABLE_MAP_H */