diff --git a/packages/compiler-core/src/utils.ts b/packages/compiler-core/src/utils.ts
index b49d70bb2fb..113096cef22 100644
--- a/packages/compiler-core/src/utils.ts
+++ b/packages/compiler-core/src/utils.ts
@@ -63,7 +63,7 @@ export function isCoreComponent(tag: string): symbol | void {
   }
 }
 
-const nonIdentifierRE = /^\d|[^\$\w\xA0-\uFFFF]/
+const nonIdentifierRE = /^$|^\d|[^\$\w\xA0-\uFFFF]/
 export const isSimpleIdentifier = (name: string): boolean =>
   !nonIdentifierRE.test(name)