diff --git a/generator/generator.csproj b/generator/generator.csproj
index e67c0f551..fbab856bb 100644
--- a/generator/generator.csproj
+++ b/generator/generator.csproj
@@ -105,5 +105,6 @@
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Xml" />
+    <Reference Include="System.Core" />
   </ItemGroup>
 </Project>