diff --git a/PROMS/Volian.Controls.Library/Volian.Controls.Library.csproj b/PROMS/Volian.Controls.Library/Volian.Controls.Library.csproj
index 3baf1aa0..aa761249 100644
--- a/PROMS/Volian.Controls.Library/Volian.Controls.Library.csproj
+++ b/PROMS/Volian.Controls.Library/Volian.Controls.Library.csproj
@@ -501,6 +501,10 @@
       <Project>{AEEE9FD1-6892-45E2-A67E-418C06D46FF9}</Project>
       <Name>Volian.Base.Library</Name>
     </ProjectReference>
+    <ProjectReference Include="..\volian.Pipe.Library\Volian.Pipe.Library.csproj">
+      <Project>{2bd7d42a-a8f6-4dea-bdca-5f4d58c6140f}</Project>
+      <Name>Volian.Pipe.Library</Name>
+    </ProjectReference>
     <ProjectReference Include="..\XYPlots\XYPlots.csproj">
       <Project>{04E168D0-9CC7-43D9-A9F1-93E481EA86A3}</Project>
       <Name>XYPlots</Name>