diff --git a/visual_studio/serial/serial.vcxproj b/visual_studio/serial/serial.vcxproj
index a78cbed..3bef985 100644
--- a/visual_studio/serial/serial.vcxproj
+++ b/visual_studio/serial/serial.vcxproj
@@ -22,6 +22,10 @@
     <ProjectGuid>{A8517FB2-C74E-43BD-B3C6-B05D3FC11ECD}</ProjectGuid>
     <RootNamespace>serial</RootNamespace>
   </PropertyGroup>
+  <PropertyGroup>
+    <PlatformToolset Condition="'$(PlatformToolset)' == '' and '$(VisualStudioVersion)' == '12.0'">v120_xp</PlatformToolset>
+    <PlatformToolset Condition="'$(PlatformToolset)' == '' and '$(VisualStudioVersion)' == '11.0'">v110_xp</PlatformToolset>
+  </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
diff --git a/visual_studio/test_serial/test_serial.vcxproj b/visual_studio/test_serial/test_serial.vcxproj
index 83c9f66..293fbce 100644
--- a/visual_studio/test_serial/test_serial.vcxproj
+++ b/visual_studio/test_serial/test_serial.vcxproj
@@ -22,6 +22,10 @@
     <ProjectGuid>{92EE7E58-C737-41F9-B795-9B6ACF6AB0B8}</ProjectGuid>
     <RootNamespace>test_serial</RootNamespace>
   </PropertyGroup>
+  <PropertyGroup>
+    <PlatformToolset Condition="'$(PlatformToolset)' == '' and '$(VisualStudioVersion)' == '12.0'">v120_xp</PlatformToolset>
+    <PlatformToolset Condition="'$(PlatformToolset)' == '' and '$(VisualStudioVersion)' == '11.0'">v110_xp</PlatformToolset>
+  </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>