diff --git a/src/spicelib/devices/hicum2/hicumL2.cpp b/src/spicelib/devices/hicum2/hicumL2.cpp
index ce6e53902..710e5b4fa 100644
--- a/src/spicelib/devices/hicum2/hicumL2.cpp
+++ b/src/spicelib/devices/hicum2/hicumL2.cpp
@@ -37,6 +37,9 @@ Spice3 Implementation: 2019 Dietmar Warning, Markus Müller, Mario Krattenmacher
  */
 
 #include "cmath"
+#ifndef M_PI
+#define M_PI 3.1415926535897932384626433832795
+#endif 
 #include <duals/dual>
 #include "hicumL2.hpp"
 #include <functional>
diff --git a/visualc/vngspice.vcxproj b/visualc/vngspice.vcxproj
index dfd9541cb..0e23fa54c 100644
--- a/visualc/vngspice.vcxproj
+++ b/visualc/vngspice.vcxproj
@@ -211,7 +211,7 @@
     </PreBuildEvent>
     <ClCompile>
       <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\src\maths\poly;..\src\frontend;..\src\spicelib\devices;tmp-bison;src\include;..\src\include;..\src\spicelib\parser;.;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\src\maths\poly;..\src\frontend;..\src\spicelib\devices;tmp-bison;src\include;..\src\include;..\src\spicelib\parser;.;c:\msys64\home\dwarning\cppduals\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_CRT_SECURE_NO_DEPRECATE;SIMULATOR;XSPICE;_MSC_PLATFORM_TOOLSET=$(PlatformToolsetVersion);NGDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MinimalRebuild>false</MinimalRebuild>
       <ExceptionHandling>
@@ -1177,6 +1177,7 @@
     <ClInclude Include="..\src\spicelib\devices\hicum2\hicum2ext.h" />
     <ClInclude Include="..\src\spicelib\devices\hicum2\hicum2init.h" />
     <ClInclude Include="..\src\spicelib\devices\hicum2\hicum2itf.h" />
+    <ClInclude Include="..\src\spicelib\devices\hicum2\hicumL2.hpp" />
     <ClInclude Include="..\src\spicelib\devices\hisim2\hisim.h" />
     <ClInclude Include="..\src\spicelib\devices\hisim2\hsm2def.h" />
     <ClInclude Include="..\src\spicelib\devices\hisim2\hsm2evalenv.h" />
@@ -2110,7 +2111,6 @@
     <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2conv.c" />
     <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2getic.c" />
     <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2init.c" />
-    <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2load.c" />
     <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2mask.c" />
     <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2mpar.c" />
     <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2noise.c" />
@@ -2120,6 +2120,7 @@
     <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2soachk.c" />
     <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2temp.c" />
     <ClCompile Include="..\src\spicelib\devices\hicum2\hicum2trunc.c" />
+    <ClCompile Include="..\src\spicelib\devices\hicum2\hicumL2.cpp" />
     <ClCompile Include="..\src\spicelib\devices\hisim2\hsm2.c" />
     <ClCompile Include="..\src\spicelib\devices\hisim2\hsm2acld.c" />
     <ClCompile Include="..\src\spicelib\devices\hisim2\hsm2ask.c" />