diff --git a/extensions/typescript-language-features/src/utils/resourceMap.ts b/extensions/typescript-language-features/src/utils/resourceMap.ts
index a10fbd91636..e942fae4583 100644
--- a/extensions/typescript-language-features/src/utils/resourceMap.ts
+++ b/extensions/typescript-language-features/src/utils/resourceMap.ts
@@ -101,5 +101,5 @@ export class ResourceMap<T> {
 }
 
 export function isWindowsPath(path: string): boolean {
-	return /^[a-zA-Z]:\\/.test(path);
+	return /^[a-zA-Z]:[\/\\]/.test(path);
 }