diff --git a/src/Numerics/Complex64.cs b/src/Numerics/Complex64.cs
index 5972976b..126072a9 100644
--- a/src/Numerics/Complex64.cs
+++ b/src/Numerics/Complex64.cs
@@ -701,7 +701,7 @@ namespace MathNet.Numerics
                 }
             }
 
-#if PORTABLE
+#if PORTABLE || NETSTANDARD
             var value = GlobalizationHelper.ParseDouble(ref token);
 #else
             var value = GlobalizationHelper.ParseDouble(ref token, format.GetCultureInfo());
diff --git a/src/Numerics/Numerics-2017.csproj b/src/Numerics/Numerics-2017.csproj
index 08c03ba6..9b4d0fff 100644
--- a/src/Numerics/Numerics-2017.csproj
+++ b/src/Numerics/Numerics-2017.csproj
@@ -6,7 +6,7 @@
         <PackageId>Math.Numerics</PackageId>
     </PropertyGroup>
     <PropertyGroup Condition="'$(TargetFramework)'=='netstandard1.3'">
-        <DefineConstants>NETSTANDARD</DefineConstants>
+        <DefineConstants>NETSTANDARD;NOSYSNUMERICS</DefineConstants>
     </PropertyGroup>
     <PropertyGroup>
         <OutputPath>..\..\out\test\Net35\</OutputPath>
@@ -22,9 +22,11 @@
         <Reference Include="System.Runtime.Serialization" />
     </ItemGroup>
     <ItemGroup Condition="'$(TargetFramework)' == 'netstandard1.3'">
-        <PackageReference Include="System.Runtime" Version="4.3.0" />
-        <PackageReference Include="System.Runtime.Serialization.Xml" Version="4.3.0" />
-        <PackageReference Include="System.Runtime.Serialization.Formatters" Version="4.3.0" />
-        <PackageReference Include="System.Security.Cryptography.Algorithms" Version="4.3.0" />
+        <PackageReference Include="System.Runtime" Version="4.3.*" />
+        <PackageReference Include="System.Runtime.Numerics" Version="4.3.*" />
+        <PackageReference Include="System.Runtime.Serialization.Xml" Version="4.3.*" />
+        <PackageReference Include="System.Runtime.Serialization.Primitives" Version="4.3.*" />
+        <PackageReference Include="System.Runtime.Serialization.Formatters" Version="4.3.*" />
+        <PackageReference Include="System.Security.Cryptography.Algorithms" Version="4.3.*" />
     </ItemGroup>
 </Project>
diff --git a/src/UnitTests/UnitTests-2017.csproj b/src/UnitTests/UnitTests-2017.csproj
index 1d5fddd7..c4cd6d08 100644
--- a/src/UnitTests/UnitTests-2017.csproj
+++ b/src/UnitTests/UnitTests-2017.csproj
@@ -8,8 +8,8 @@
         <AssemblyName>MathNet.Numerics.UnitTests</AssemblyName>
         <RootNamespace>MathNet.Numerics.UnitTests</RootNamespace>
     </PropertyGroup>
-    <PropertyGroup Condition="$(TargetFramework.Contains('netcoreapp'))">
-        <DefineConstants>NETSTANDARD</DefineConstants>
+    <PropertyGroup Condition="$(TargetFramework.Contains('netcoreapp')) OR $(TargetFramework.Contains('netstandard'))">
+        <DefineConstants>NETSTANDARD;NOSYSNUMERICS</DefineConstants>
     </PropertyGroup>
     <ItemGroup Condition="'$(TargetFramework)' == 'net45'">
         <Reference Include="System" />
@@ -19,7 +19,7 @@
         <Reference Include="System.Runtime.Serialization" />
         <Reference Include="System.Xml" />
     </ItemGroup>
-    <ItemGroup Condition="$(TargetFramework.Contains('netcoreapp'))">
+    <ItemGroup Condition="$(TargetFramework.Contains('netcoreapp')) OR $(TargetFramework.Contains('netstandard'))">
         <PackageReference Include="System.Reflection" Version="4.3.*" />
         <PackageReference Include="System.Reflection.Extensions" Version="4.3.*" />
         <PackageReference Include="System.Reflection.TypeExtensions" Version="4.4.*" />
@@ -33,7 +33,7 @@
       <ProjectReference Include="..\Numerics\Numerics-2017.csproj" />
       <ProjectReference Include="..\TestData\TestData-2017.csproj" />
     </ItemGroup>
-    <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">
+    <ItemGroup Condition="$(TargetFramework.Contains('netcoreapp')) OR $(TargetFramework.Contains('netstandard'))">
         <PackageReference Include="System.Xml.XmlSerializer" Version="4.3.*" />
     </ItemGroup>
 </Project>