diff --git a/scm-ui/ui-components/src/repos/diffs.ts b/scm-ui/ui-components/src/repos/diffs.ts
index 029803a0a4..0f39f3a4dc 100644
--- a/scm-ui/ui-components/src/repos/diffs.ts
+++ b/scm-ui/ui-components/src/repos/diffs.ts
@@ -41,5 +41,5 @@ export function createHunkIdentifierFromContext(ctx: BaseContext) {
 }
 
 export function escapeWhitespace(path: string) {
-  return path.toLowerCase().replace(/\W/g, "-");
+  return path?.toLowerCase().replace(/\W/g, "-");
 }