diff --git a/dlls/tfc/tfcx/msvc/tfcx.vcproj b/dlls/tfc/tfcx/msvc/tfcx.vcproj
index 99181887..ab7cd15a 100755
--- a/dlls/tfc/tfcx/msvc/tfcx.vcproj
+++ b/dlls/tfc/tfcx/msvc/tfcx.vcproj
@@ -88,7 +88,7 @@
 				Optimization="2"
 				InlineFunctionExpansion="1"
 				AdditionalIncludeDirectories="..\..\amxmodx,..\..\metamod,..\..\sdk\common,..\..\sdk\engine,..\..\sdk\dlls"
-				PreprocessorDefinitions="tfcx_EXPORTS"
+				PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;_USRDLL;tfcx_EXPORTS"
 				StringPooling="TRUE"
 				RuntimeLibrary="4"
 				StructMemberAlignment="3"
diff --git a/dlls/tfc/tfcx/msvc8/tfcx.vcproj b/dlls/tfc/tfcx/msvc8/tfcx.vcproj
index a0b10872..0a747dbe 100644
--- a/dlls/tfc/tfcx/msvc8/tfcx.vcproj
+++ b/dlls/tfc/tfcx/msvc8/tfcx.vcproj
@@ -145,7 +145,7 @@
 				Optimization="2"
 				InlineFunctionExpansion="1"
 				AdditionalIncludeDirectories="..\..\amxmodx,..\..\metamod,..\..\sdk\common,..\..\sdk\engine,..\..\sdk\dlls"
-				PreprocessorDefinitions="tfcx_EXPORTS"
+				PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;_USRDLL;tfcx_EXPORTS"
 				StringPooling="true"
 				RuntimeLibrary="0"
 				StructMemberAlignment="3"