--- a/src/core/core11.vcxproj
+++ b/src/core/core11.vcxproj
@@ -321,7 +321,6 @@
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
-    <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
     <OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(PWSLib)\</OutDir>
     <OutDir Condition="'$(Configuration)|$(Platform)'=='Debug64|x64'">$(PWSLib)\</OutDir>
     <IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(PWSobj)\$(ProjectName)\</IntDir>