diff --git a/lib/c/2014/labcomm2014.vcxproj b/lib/c/2014/labcomm2014.vcxproj
index 6922d42b74778623839917d0edc0ab3a59318747..4bf8b0c5ee9b8b1076c1ed5d34128a4959491881 100644
--- a/lib/c/2014/labcomm2014.vcxproj
+++ b/lib/c/2014/labcomm2014.vcxproj
@@ -97,6 +97,7 @@
     </PreBuildEvent>
     <ClCompile>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <PreprocessorDefinitions>LABCOMM_COMPAT="labcomm2014_compat_tc31.h";LABCOMM_NO_STDIO;USE_CRT_OWN_IMPL;_AMD64_;_X64_;_WIN64;STD_CALL;CONDITION_HANDLING;WIN32_LEAN_AND_MEAN;_IDWBUILD;IS_R0;WINNT;_WDM_INCLUDED_;_WIN32_WINNT=_WIN32_WINNT_WINXP;NTDDI_VERSION=NTDDI_WINXPSP2;TC_VER=301;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
   </ItemDefinitionGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />