diff --git a/osu.Desktop.VisualTests/osu.Desktop.VisualTests.csproj b/osu.Desktop.VisualTests/osu.Desktop.VisualTests.csproj
index 4430339937..22946a6433 100644
--- a/osu.Desktop.VisualTests/osu.Desktop.VisualTests.csproj
+++ b/osu.Desktop.VisualTests/osu.Desktop.VisualTests.csproj
@@ -92,7 +92,10 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="mscorlib" />
-    <Reference Include="OpenTK, Version=1.2.0.0, Culture=neutral, PublicKeyToken=bad199fe84eb3df4" />
+    <Reference Include="OpenTK, Version=1.2.0.0, Culture=neutral, PublicKeyToken=bad199fe84eb3df4, processorArchitecture=MSIL">
+      <HintPath>..\packages\ppy.OpenTK.1.1.2225.3\lib\net20\OpenTK.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="System" />
   </ItemGroup>
   <ItemGroup>