diff --git a/visualc/sharedspice.vcxproj b/visualc/sharedspice.vcxproj
index 7cc3c9e61..29d09acf6 100644
--- a/visualc/sharedspice.vcxproj
+++ b/visualc/sharedspice.vcxproj
@@ -9,10 +9,22 @@
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       <Platform>Win32</Platform>
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+    <ProjectConfiguration Include="Release|x64">
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+    <ProjectConfiguration Include="ReleaseOMP|x64">
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   <PropertyGroup Label="Globals">
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@@ -27,10 +39,22 @@
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
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+    <PlatformToolset>v140</PlatformToolset>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
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   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseOMP|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <PlatformToolset>v140</PlatformToolset>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseOMP|x64'" Label="Configuration">
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   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
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@@ -40,9 +64,18 @@
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     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
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   <ImportGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseOMP|Win32'" Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseOMP|x64'" Label="PropertySheets">
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@@ -56,9 +89,18 @@
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     <LinkIncremental />
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental />
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental />
+  </PropertyGroup>
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     <LinkIncremental />
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseOMP|x64'">
+    <LinkIncremental />
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     <PreBuildEvent>
       <Message>force recompilation of conf.c with actual date</Message>
@@ -141,6 +183,97 @@
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     </Link>
   </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <PreBuildEvent>
+      <Message>force recompilation of conf.c with actual date</Message>
+      <Command>if exist $(IntDir)conf.obj del $(IntDir)conf.obj</Command>
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+    <CustomBuildStep>
+      <Message>
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+      <Command>
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+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>..\src\maths\poly;..\src\frontend;..\src\spicelib\devices;tmp-bison;src\include;..\src\include;..\src\spicelib\parser;.;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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+      <ExceptionHandling>
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+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
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+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
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+    <Link>
+      <AdditionalDependencies>psapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <GenerateMapFile>false</GenerateMapFile>
+      <SubSystem>Windows</SubSystem>
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+    <ClCompile>
+      <Optimization>Full</Optimization>
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+      <ExceptionHandling>
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+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
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+      <AdditionalDependencies>psapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
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@@ -183,6 +316,52 @@
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     <ClInclude Include="..\src\ciderlib\oned\onedext.h" />