diff --git a/windows/netgen.vcproj b/windows/netgen.vcproj
index d7677f89..4aab0caa 100644
--- a/windows/netgen.vcproj
+++ b/windows/netgen.vcproj
@@ -43,13 +43,13 @@
Name="VCCLCompilerTool"
Optimization="0"
AdditionalIncludeDirectories=""$(SolutionDir)..";"$(SolutionDir)..\ng";"$(SolutionDir)..\libsrc\include";"$(SolutionDir)..\libsrc\interface";"$(SolutionDir)..\..\ext_libs\tcl\include";"$(SolutionDir)..\..\ext_libs\pthread-w32\include""
- PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE;DEBUG;MSVC_EXPRESS;OPENGL;WINVER=0x0501;NGINTERFACE_EXPORTS"
+ PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE;DEBUG;MSVC_EXPRESS;OPENGL;WINVER=0x0600;NTDDI_VERSION=NTDDI_VISTA;NGINTERFACE_EXPORTS"
MinimalRebuild="true"
BasicRuntimeChecks="3"
RuntimeLibrary="3"
UsePrecompiledHeader="0"
WarningLevel="3"
- Detect64BitPortabilityProblems="false"
+ Detect64BitPortabilityProblems="true"
DebugInformationFormat="4"
/>