diff --git a/src/Workspaces/Core/Portable/Workspace/ProjectSystem/ProjectSystemProjectFactory.cs b/src/Workspaces/Core/Portable/Workspace/ProjectSystem/ProjectSystemProjectFactory.cs
index 5052ba2e7cfd7..b13bc77fbfa10 100644
--- a/src/Workspaces/Core/Portable/Workspace/ProjectSystem/ProjectSystemProjectFactory.cs
+++ b/src/Workspaces/Core/Portable/Workspace/ProjectSystem/ProjectSystemProjectFactory.cs
@@ -879,7 +879,7 @@ await ApplyBatchChangeToWorkspaceAsync((solutionChanges, projectUpdateState) =>
                 {
                     cancellationToken.ThrowIfCancellationRequested();
 
-                    if (getFilePath(oldReference) == fullFilePath)
+                    if (fullFilePath.Equals(getFilePath(oldReference), StringComparison.OrdinalIgnoreCase))
                     {
                         var newSolution = solutionChanges.Solution;
                         (newSolution, projectUpdateState) = update(