diff --git a/src/System.IO.FileSystem.AccessControl/src/System.IO.FileSystem.AccessControl.csproj b/src/System.IO.FileSystem.AccessControl/src/System.IO.FileSystem.AccessControl.csproj
index 8c6272772263..544f9670ee7c 100644
--- a/src/System.IO.FileSystem.AccessControl/src/System.IO.FileSystem.AccessControl.csproj
+++ b/src/System.IO.FileSystem.AccessControl/src/System.IO.FileSystem.AccessControl.csproj
@@ -34,7 +34,7 @@
     <Compile Include="System\IO\FileSystemAclExtensions.net46.cs" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetGroup)'!='netfx'">
-	<Reference Include="System.Collections.NonGeneric" />
+    <Reference Include="System.Collections.NonGeneric" />
     <Reference Include="System.Diagnostics.Contracts" />
     <Reference Include="System.Diagnostics.Debug" />
     <Reference Include="System.IO.FileSystem" />