diff --git a/internal/parser/parser.go b/internal/parser/parser.go
index 8ced9412b8..3c9ecee716 100644
--- a/internal/parser/parser.go
+++ b/internal/parser/parser.go
@@ -4198,6 +4198,7 @@ func (p *Parser) parseParenthesizedArrowFunctionExpression(allowAmbiguity bool,
 		if !allowAmbiguity {
 			return nil
 		}
+		parameters = p.parseEmptyNodeList()
 	} else {
 		if !allowAmbiguity {
 			maybeParameters := p.parseParametersWorker(signatureFlags, allowAmbiguity)