diff --git a/visualc/sharedspice.vcxproj b/visualc/sharedspice.vcxproj
index 4a4e6a5ea..ad20b12d3 100644
--- a/visualc/sharedspice.vcxproj
+++ b/visualc/sharedspice.vcxproj
@@ -497,6 +497,7 @@
     <ClInclude Include="..\src\include\ngspice\cmconstants.h" />
     <ClInclude Include="..\src\include\ngspice\cmproto.h" />
     <ClInclude Include="..\src\include\ngspice\cmtypes.h" />
+    <ClInclude Include="..\src\include\ngspice\logicexp.h" />
     <ClInclude Include="..\src\include\ngspice\spardefs.h" />
     <ClInclude Include="..\src\include\ngspice\compatmode.h" />
     <ClInclude Include="..\src\include\ngspice\complex.h" />
@@ -1041,6 +1042,7 @@
     <ClCompile Include="..\src\frontend\interp.c" />
     <ClCompile Include="..\src\frontend\inventory.c" />
     <ClCompile Include="..\src\frontend\linear.c" />
+    <ClCompile Include="..\src\frontend\logicexp.c" />
     <ClCompile Include="..\src\frontend\measure.c" />
     <ClCompile Include="..\src\frontend\misccoms.c" />
     <ClCompile Include="..\src\frontend\miscvars.c" />
diff --git a/visualc/vngspice-fftw.vcxproj b/visualc/vngspice-fftw.vcxproj
index e3716f983..c3a54f6bd 100644
--- a/visualc/vngspice-fftw.vcxproj
+++ b/visualc/vngspice-fftw.vcxproj
@@ -944,6 +944,7 @@ lib /machine:x64 /def:..\..\fftw-3.3-dll64\libfftw3-3.def /out:$(IntDir)libfftw3
     <ClInclude Include="..\src\include\ngspice\cmconstants.h" />
     <ClInclude Include="..\src\include\ngspice\cmproto.h" />
     <ClInclude Include="..\src\include\ngspice\cmtypes.h" />
+    <ClInclude Include="..\src\include\ngspice\logicexp.h" />
     <ClInclude Include="..\src\include\ngspice\spardefs.h" />
     <ClInclude Include="..\src\include\ngspice\wincolornames.h" />
     <ClInclude Include="..\src\include\ngspice\compatmode.h" />
@@ -1492,6 +1493,7 @@ lib /machine:x64 /def:..\..\fftw-3.3-dll64\libfftw3-3.def /out:$(IntDir)libfftw3
     <ClCompile Include="..\src\frontend\interp.c" />
     <ClCompile Include="..\src\frontend\inventory.c" />
     <ClCompile Include="..\src\frontend\linear.c" />
+    <ClCompile Include="..\src\frontend\logicexp.c" />
     <ClCompile Include="..\src\frontend\measure.c" />
     <ClCompile Include="..\src\frontend\misccoms.c" />
     <ClCompile Include="..\src\frontend\miscvars.c" />