diff --git a/src/Numerics/Numerics-NetStandard.csproj b/src/Numerics/Numerics-NetStandard.csproj
index a85b90b8..9935c230 100644
--- a/src/Numerics/Numerics-NetStandard.csproj
+++ b/src/Numerics/Numerics-NetStandard.csproj
@@ -18,7 +18,7 @@
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\..\</SolutionDir>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <DefineConstants>TRACE;PORTABLE;NOSYSNUMERICS;NET45REFLECTION</DefineConstants>
+    <DefineConstants>TRACE;PORTABLE;NET45REFLECTION</DefineConstants>
     <OutputPath>..\..\out\lib\NetStandard\</OutputPath>
     <IntermediateOutputPath>..\..\obj\lib\Profile259\</IntermediateOutputPath>
     <BaseIntermediateOutputPath>..\..\obj\lib\Profile259\</BaseIntermediateOutputPath>
@@ -32,7 +32,7 @@
     <LangVersion>5</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <DefineConstants>TRACE;DEBUG;PORTABLE;NOSYSNUMERICS;NET45REFLECTION</DefineConstants>
+    <DefineConstants>TRACE;DEBUG;PORTABLE;NET45REFLECTION</DefineConstants>
     <OutputPath>..\..\out\lib-debug\NetStandard\</OutputPath>
     <IntermediateOutputPath>..\..\obj\lib-debug\Profile259\</IntermediateOutputPath>
     <BaseIntermediateOutputPath>..\..\obj\lib-debug\Profile259\</BaseIntermediateOutputPath>