diff --git a/apps/web/src/lib/turnDiffTree.test.ts b/apps/web/src/lib/turnDiffTree.test.ts
index bf792a803238c..15340c8e8bfdf 100644
--- a/apps/web/src/lib/turnDiffTree.test.ts
+++ b/apps/web/src/lib/turnDiffTree.test.ts
@@ -138,4 +138,34 @@ describe("buildTurnDiffTree", () => {
       },
     ]);
   });
+
+  it("keeps a literal backslash in a POSIX file name instead of splitting it into a folder", () => {
+    expect(
+      buildTurnDiffTree([
+        { path: "back\\slash.txt", kind: "modified", additions: 1, deletions: 0 },
+        { path: "back/slash.txt", kind: "modified", additions: 2, deletions: 0 },
+      ]),
+    ).toEqual([
+      {
+        kind: "directory",
+        name: "back",
+        path: "back",
+        stat: { additions: 2, deletions: 0 },
+        children: [
+          {
+            kind: "file",
+            name: "slash.txt",
+            path: "back/slash.txt",
+            stat: { additions: 2, deletions: 0 },
+          },
+        ],
+      },
+      {
+        kind: "file",
+        name: "back\\slash.txt",
+        path: "back\\slash.txt",
+        stat: { additions: 1, deletions: 0 },
+      },
+    ]);
+  });
 });
diff --git a/apps/web/src/lib/turnDiffTree.ts b/apps/web/src/lib/turnDiffTree.ts
index 7d491e15ccfb5..7cceba0137847 100644
--- a/apps/web/src/lib/turnDiffTree.ts
+++ b/apps/web/src/lib/turnDiffTree.ts
@@ -33,10 +33,7 @@ interface MutableDirectoryNode {
 let sortCollator: Intl.Collator | undefined;
 
 function normalizePathSegments(pathValue: string): string[] {
-  return pathValue
-    .replaceAll("\\", "/")
-    .split("/")
-    .filter((segment) => segment.length > 0);
+  return pathValue.split("/").filter((segment) => segment.length > 0);
 }
 
 function compareByName(a: { name: string }, b: { name: string }): number {