diff --git a/visualc/vngspice-fftw.vcxproj b/visualc/vngspice-fftw.vcxproj
index ac78cc4b3..026d116fe 100644
--- a/visualc/vngspice-fftw.vcxproj
+++ b/visualc/vngspice-fftw.vcxproj
@@ -673,7 +673,7 @@ lib /machine:x64 /def:..\..\fftw-3.3-dll64\libfftw3-3.def /out:$(IntDir)libfftw3
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <WholeProgramOptimization>true</WholeProgramOptimization>
-      <AdditionalIncludeDirectories>..\src\maths\poly;..\src\frontend;..\src\spicelib\devices;tmp-bison;src\include;..\src\spicelib\parser;..\src\include;..\src\include\cppduals;.;..\..\fftw-3.3-dll32;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\src\maths\poly;..\src\frontend;..\src\spicelib\devices;tmp-bison;src\include;..\src\spicelib\parser;..\src\include;..\src\include\cppduals;.;..\..\fftw-3.3-dll64;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_CRT_SECURE_NO_DEPRECATE;SIMULATOR;XSPICE;USE_OMP;CONFIG64;HAVE_LIBFFTW3;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MinimalRebuild>false</MinimalRebuild>
       <ExceptionHandling>