diff --git a/src/Workspaces/Core/Portable/Workspace/Solution/SolutionState.cs b/src/Workspaces/Core/Portable/Workspace/Solution/SolutionState.cs
index e79f594cd88c7..cfa66a9c6a946 100644
--- a/src/Workspaces/Core/Portable/Workspace/Solution/SolutionState.cs
+++ b/src/Workspaces/Core/Portable/Workspace/Solution/SolutionState.cs
@@ -314,7 +314,7 @@ private SolutionState CreatePrimarySolution(
                 _filePathToDocumentIdsMap,
                 _dependencyGraph,
                 _lazyAnalyzers,
-                frozenSourceGeneratedDocument: null);
+                _frozenSourceGeneratedDocumentState);
         }
 
         private BranchId GetBranchId()