diff --git a/src/VisualStudio/Core/Def/Implementation/ProjectSystem/DocumentProvider.StandardTextDocument.cs b/src/VisualStudio/Core/Def/Implementation/ProjectSystem/DocumentProvider.StandardTextDocument.cs
index d53a0b48528a287903718042ce5a17dcbda7c00a..050c3e36cc2dc4058418db1ad79248b680a3457f 100644
--- a/src/VisualStudio/Core/Def/Implementation/ProjectSystem/DocumentProvider.StandardTextDocument.cs
+++ b/src/VisualStudio/Core/Def/Implementation/ProjectSystem/DocumentProvider.StandardTextDocument.cs
@@ -257,8 +257,9 @@ public uint GetItemId()
                 }
 
                 uint itemId;
-                Project.Hierarchy.ParseCanonicalName(_itemMoniker, out itemId);
-                return itemId;
+                return Project.Hierarchy.ParseCanonicalName(_itemMoniker, out itemId) == VSConstants.S_OK
+                    ? itemId
+                    : (uint)VSConstants.VSITEMID.Nil;
             }
         }
     }
diff --git a/src/VisualStudio/Core/Def/Implementation/Venus/ContainedDocument.cs b/src/VisualStudio/Core/Def/Implementation/Venus/ContainedDocument.cs
index b2f026a030544bc4e1d84a4338129cdfa8f4f2aa..94ce1e81f8b8e0021efb8ef1f5ef320102cc6be8 100644
--- a/src/VisualStudio/Core/Def/Implementation/Venus/ContainedDocument.cs
+++ b/src/VisualStudio/Core/Def/Implementation/Venus/ContainedDocument.cs
@@ -1180,8 +1180,9 @@ public uint GetItemId()
             }
 
             uint itemId;
-            Project.Hierarchy.ParseCanonicalName(_itemMoniker, out itemId);
-            return itemId;
+            return Project.Hierarchy.ParseCanonicalName(_itemMoniker, out itemId) == VSConstants.S_OK
+                ? itemId
+                : (uint)VSConstants.VSITEMID.Nil;
         }
 
         private enum RazorCodeBlockType