diff --git a/src/go/parser/parser.go b/src/go/parser/parser.go
index 17808b366f..26b9630cfc 100644
--- a/src/go/parser/parser.go
+++ b/src/go/parser/parser.go
@@ -2667,8 +2667,8 @@ func (p *parser) parseTypeSpec(doc *ast.CommentGroup, _ token.Token, _ int) ast.
 //	P*[]int     T/F      P       *[]int
 //	P*E         T        P       *E
 //	P*E         F        nil     P*E
-//	P([]int)    T/F      P       []int
-//	P(E)        T        P       E
+//	P([]int)    T/F      P       ([]int)
+//	P(E)        T        P       (E)
 //	P(E)        F        nil     P(E)
 //	P*E|F|~G    T/F      P       *E|F|~G
 //	P*E|F|G     T        P       *E|F|G
@@ -2695,8 +2695,11 @@ func extractName(x ast.Expr, force bool) (*ast.Ident, ast.Expr) {
 	case *ast.CallExpr:
 		if name, _ := x.Fun.(*ast.Ident); name != nil {
 			if len(x.Args) == 1 && x.Ellipsis == token.NoPos && (force || isTypeElem(x.Args[0])) {
-				// x = name "(" x.ArgList[0] ")"
-				return name, x.Args[0]
+				return name, &ast.ParenExpr{
+					Lparen: x.Lparen,
+					X:      x.Args[0],
+					Rparen: x.Rparen,
+				}
 			}
 		}
 	}
diff --git a/src/go/parser/parser_test.go b/src/go/parser/parser_test.go
index eea743c2b5..bd67d3fa57 100644
--- a/src/go/parser/parser_test.go
+++ b/src/go/parser/parser_test.go
@@ -821,3 +821,18 @@ func TestIssue57490(t *testing.T) {
 		t.Fatalf("offset = %d, want %d", offset, tokFile.Size())
 	}
 }
+
+func TestParseTypeParamsAsParenExpr(t *testing.T) {
+	const src = "package p\ntype X[A (B),] struct{}"
+
+	fs := token.NewFileSet()
+	f, err := ParseFile(fs, "test.go", src, ParseComments|SkipObjectResolution)
+	if err != nil {
+		t.Fatal(err)
+	}
+	typeParam := f.Decls[0].(*ast.GenDecl).Specs[0].(*ast.TypeSpec).TypeParams.List[0].Type
+	_, ok := typeParam.(*ast.ParenExpr)
+	if !ok {
+		t.Fatalf("typeParam is a %T; want: *ast.ParenExpr", typeParam)
+	}
+}