diff --git a/src/server/session.ts b/src/server/session.ts
index d24e2addd33..8ec6d357423 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -1700,7 +1700,7 @@ namespace ts.server {
 
         private getEditsForFileRename(args: protocol.GetEditsForFileRenameRequestArgs, simplifiedResult: boolean): ReadonlyArray<protocol.FileCodeEdits> | ReadonlyArray<FileTextChanges> {
             const { file, project } = this.getFileAndProject(args);
-            const changes = project.getLanguageService().getEditsForFileRename(args.oldFilePath, args.newFilePath, this.getFormatOptions(file), this.getPreferences(file));
+            const changes = project.getLanguageService().getEditsForFileRename(toNormalizedPath(args.oldFilePath), toNormalizedPath(args.newFilePath), this.getFormatOptions(file), this.getPreferences(file));
             return simplifiedResult ? this.mapTextChangesToCodeEdits(project, changes) : changes;
         }