diff --git a/js/parse.go b/js/parse.go
index 46f43e4..18a3c38 100644
--- a/js/parse.go
+++ b/js/parse.go
@@ -2242,7 +2242,7 @@ func (p *Parser) parseParenthesizedExpressionOrArrowFunc(prec OpPrec, async []by
 		left = p.scope.Use(async)
 		left = &CallExpr{left, Args{}, false}
 		precLeft = OpCall
-	} else if len(list) == 0 || !isAsync && rest != nil || isAsync && OpCall < prec {
+	} else if len(list) == 0 && rest == nil || !isAsync && rest != nil || isAsync && OpCall < prec {
 		p.fail("arrow function", ArrowToken)
 		return nil
 	} else {
diff --git a/js/parse_test.go b/js/parse_test.go
index 0343a87..0d91637 100644
--- a/js/parse_test.go
+++ b/js/parse_test.go
@@ -187,6 +187,7 @@ func TestParse(t *testing.T) {
 		{"async function a(){ for await (var a of b) {} }", "Decl(async function a Params() Stmt({ Stmt(for await Decl(var Binding(a)) of b Stmt({ })) }))"},
 		{"async function a(){ (await a) }", "Decl(async function a Params() Stmt({ Stmt((await a)) }))"},
 		{"x = {async a(b){}}", "Stmt(x={Method(async a Params(Binding(b)) Stmt({ }))})"},
+		{"async(...a)", "Stmt(async(...a))"},
 
 		// bindings
 		{"let [] = z", "Decl(let Binding([ ] = z))"},