diff --git a/src/VisualStudio/Core/Def/ProjectSystem/OpenTextBufferProvider.cs b/src/VisualStudio/Core/Def/ProjectSystem/OpenTextBufferProvider.cs
index 6c7a4349d66ee..7013912097a7e 100644
--- a/src/VisualStudio/Core/Def/ProjectSystem/OpenTextBufferProvider.cs
+++ b/src/VisualStudio/Core/Def/ProjectSystem/OpenTextBufferProvider.cs
@@ -340,7 +340,7 @@ public void Dispose()
             return;
         }
 
-        var runningDocumentTableForEvents = (IVsRunningDocumentTable)_runningDocumentTable;
+        var runningDocumentTableForEvents = (IVsRunningDocumentTable)_runningDocumentTable.Value;
         runningDocumentTableForEvents.UnadviseRunningDocTableEvents(_runningDocumentTableEventsCookie);
         _runningDocumentTableEventsCookie = 0;