diff --git a/tools/mmp/mmp.csproj b/tools/mmp/mmp.csproj
index c364ca2102..6082af6937 100644
--- a/tools/mmp/mmp.csproj
+++ b/tools/mmp/mmp.csproj
@@ -163,6 +163,9 @@
     <Compile Include="..\..\external\mono\external\linker\linker\Linker.Steps\OutputStep.cs">
       <Link>Linker.Steps\OutputStep.cs</Link>
     </Compile>
+    <Compile Include="..\..\external\mono\external\linker\linker\Linker.Steps\PreserveDependencyLookupStep.cs">
+      <Link>Linker.Steps\PreserveDependencyLookupStep.cs</Link>
+    </Compile>
     <Compile Include="..\..\external\mono\external\linker\linker\Linker.Steps\RegenerateGuidStep.cs">
       <Link>Linker.Steps\RegenerateGuidStep.cs</Link>
     </Compile>
diff --git a/tools/mtouch/mtouch.csproj b/tools/mtouch/mtouch.csproj
index 984e25d5c3..9a3cd76ed8 100644
--- a/tools/mtouch/mtouch.csproj
+++ b/tools/mtouch/mtouch.csproj
@@ -154,6 +154,9 @@
     <Compile Include="..\..\external\mono\external\linker\linker\Linker.Steps\OutputStep.cs">
       <Link>Linker.Steps\OutputStep.cs</Link>
     </Compile>
+    <Compile Include="..\..\external\mono\external\linker\linker\Linker.Steps\PreserveDependencyLookupStep.cs">
+      <Link>Linker.Steps\PreserveDependencyLookupStep.cs</Link>
+    </Compile>
     <Compile Include="..\..\external\mono\external\linker\linker\Linker.Steps\ResolveFromAssemblyStep.cs">
       <Link>Linker.Steps\ResolveFromAssemblyStep.cs</Link>
     </Compile>