diff --git a/Duplicati/Library/Main/Duplicati.Library.Main.csproj b/Duplicati/Library/Main/Duplicati.Library.Main.csproj
index 9628f3718..2fe7da3ab 100644
--- a/Duplicati/Library/Main/Duplicati.Library.Main.csproj
+++ b/Duplicati/Library/Main/Duplicati.Library.Main.csproj
@@ -43,6 +43,7 @@
       <HintPath>..\..\..\packages\Newtonsoft.Json.8.0.2\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
     <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Options.cs" />