diff --git a/Controls.DocumentViewer/DocumentViewer.vbproj b/Controls.DocumentViewer/DocumentViewer.vbproj
index e0494014..738e782c 100644
--- a/Controls.DocumentViewer/DocumentViewer.vbproj
+++ b/Controls.DocumentViewer/DocumentViewer.vbproj
@@ -265,9 +265,7 @@
     <Compile Include="DocumentViewer.Designer.vb">
       <DependentUpon>DocumentViewer.vb</DependentUpon>
     </Compile>
-    <Compile Include="DocumentViewer.vb">
-      <SubType>UserControl</SubType>
-    </Compile>
+    <Compile Include="DocumentViewer.vb" />
     <Compile Include="frmViewerSettings.Designer.vb">
       <DependentUpon>frmViewerSettings.vb</DependentUpon>
     </Compile>