diff --git a/es2panda/ir/base/scriptFunction.h b/es2panda/ir/base/scriptFunction.h
index 9e2dadfaef1c89126dacc5867e9be4c497cac5ef..b610c74a5086febc1abb2a56aeab59a0d39524a1 100644
--- a/es2panda/ir/base/scriptFunction.h
+++ b/es2panda/ir/base/scriptFunction.h
@@ -194,7 +194,7 @@ public:
 
     bool CanBeConcurrent() const
     {
-        return !(IsGenerator() || IsAsync() || IsArrow() || IsConstructor() || IsMethod());
+        return !(IsGenerator() || IsArrow() || IsConstructor() || IsMethod());
     }
 
     void Iterate(const NodeTraverser &cb) const override;