diff --git a/projects/openttd_vs100.vcxproj b/projects/openttd_vs100.vcxproj
index a0e8d58..290e19b 100644
--- a/projects/openttd_vs100.vcxproj
+++ b/projects/openttd_vs100.vcxproj
@@ -47,6 +47,9 @@
     <WholeProgramOptimization>true</WholeProgramOptimization>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+    <Import Project="$(VCTargetsPath)\BuildCustomizations\masm.props" />
+  </ImportGroup>
   <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
@@ -144,6 +147,7 @@
       </DataExecutionPrevention>
       <TargetMachine>MachineX86</TargetMachine>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <MinimumRequiredVersion>5.0</MinimumRequiredVersion>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
@@ -187,6 +191,7 @@
       <DataExecutionPrevention>
       </DataExecutionPrevention>
       <TargetMachine>MachineX86</TargetMachine>
+      <MinimumRequiredVersion>5.0</MinimumRequiredVersion>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -1103,6 +1108,10 @@
   <ItemGroup>
     <None Include="..\media\openttd.ico" />
     <None Include="..\readme.txt" />
+    <MASM Include="..\src\os\windows\vs100_stub.asm">
+      <FileType>Document</FileType>
+      <ExcludedFromBuild Condition="'$(Platform)'=='x64'">true</ExcludedFromBuild>
+    </MASM>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="langs_vs100.vcxproj">
@@ -1119,4 +1128,7 @@
     </ProjectReference>
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+    <Import Project="$(VCTargetsPath)\BuildCustomizations\masm.targets" />
+  </ImportGroup>
 </Project>
diff --git a/projects/openttd_vs100.vcxproj.filters b/projects/openttd_vs100.vcxproj.filters
index bc0b7b6..1b7621a 100644
--- a/projects/openttd_vs100.vcxproj.filters
+++ b/projects/openttd_vs100.vcxproj.filters
@@ -2522,4 +2522,9 @@
     <None Include="..\media\openttd.ico" />
     <None Include="..\readme.txt" />
   </ItemGroup>
+  <ItemGroup>
+    <MASM Include="..\src\os\windows\vs100_stub.asm">
+      <Filter>Windows files</Filter>
+    </MASM>
+  </ItemGroup>
 </Project>
diff --git a/projects/openttd_vs100.vcxproj.filters.in b/projects/openttd_vs100.vcxproj.filters.in
index cda4910..a6a7976 100644
--- a/projects/openttd_vs100.vcxproj.filters.in
+++ b/projects/openttd_vs100.vcxproj.filters.in
@@ -10,4 +10,9 @@
     <None Include="..\media\openttd.ico" />
     <None Include="..\readme.txt" />
   </ItemGroup>
+  <ItemGroup>
+    <MASM Include="..\src\os\windows\vs100_stub.asm">
+      <Filter>Windows files</Filter>
+    </MASM>
+  </ItemGroup>
 </Project>
diff --git a/projects/openttd_vs100.vcxproj.in b/projects/openttd_vs100.vcxproj.in
index 6f63b72..37684a2 100644
--- a/projects/openttd_vs100.vcxproj.in
+++ b/projects/openttd_vs100.vcxproj.in
@@ -47,6 +47,9 @@
     <WholeProgramOptimization>true</WholeProgramOptimization>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+    <Import Project="$(VCTargetsPath)\BuildCustomizations\masm.props" />
+  </ImportGroup>
   <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
@@ -144,6 +147,7 @@
       </DataExecutionPrevention>
       <TargetMachine>MachineX86</TargetMachine>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <MinimumRequiredVersion>5.0</MinimumRequiredVersion>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
@@ -187,6 +191,7 @@
       <DataExecutionPrevention>
       </DataExecutionPrevention>
       <TargetMachine>MachineX86</TargetMachine>
+      <MinimumRequiredVersion>5.0</MinimumRequiredVersion>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -296,6 +301,10 @@
   <ItemGroup>
     <None Include="..\media\openttd.ico" />
     <None Include="..\readme.txt" />
+    <MASM Include="..\src\os\windows\vs100_stub.asm">
+      <FileType>Document</FileType>
+      <ExcludedFromBuild Condition="'$(Platform)'=='x64'">true</ExcludedFromBuild>
+    </MASM>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="langs_vs100.vcxproj">
@@ -312,4 +321,7 @@
     </ProjectReference>
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+    <Import Project="$(VCTargetsPath)\BuildCustomizations\masm.targets" />
+  </ImportGroup>
 </Project>
diff --git a/src/os/windows/vs100_stub.asm b/src/os/windows/vs100_stub.asm
new file mode 100644
index 0000000..a7b4494
--- /dev/null
+++ b/src/os/windows/vs100_stub.asm
@@ -0,0 +1,24 @@
+; $Id$
+
+; 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/>.
+
+		.386
+		.MODEL FLAT
+		.DATA
+
+PUBLIC	__imp__EncodePointer@4
+PUBLIC	__imp__DecodePointer@4
+
+__imp__EncodePointer@4	DD	dummy
+__imp__DecodePointer@4	DD	dummy
+
+		.CODE
+
+dummy:
+		MOV EAX,[ESP+4]
+		RETN 4
+
+		END