diff --git a/internal/js_parser/js_parser.go b/internal/js_parser/js_parser.go
index e41bc4eb37..8c989c477c 100644
--- a/internal/js_parser/js_parser.go
+++ b/internal/js_parser/js_parser.go
@@ -2070,10 +2070,11 @@ func (p *parser) parseProperty(startLoc logger.Loc, kind js_ast.PropertyKind, op
 		p.lexer.Next()
 
 	case js_lexer.TPrivateIdentifier:
-		if !opts.isClass || (p.options.ts.Config.ExperimentalDecorators == config.True && len(opts.decorators) > 0) {
+		if p.options.ts.Parse && p.options.ts.Config.ExperimentalDecorators == config.True && len(opts.decorators) > 0 {
+			p.log.AddError(&p.tracker, p.lexer.Range(), "TypeScript experimental decorators cannot be used on private identifiers")
+		} else if !opts.isClass {
 			p.lexer.Expected(js_lexer.TIdentifier)
-		}
-		if opts.tsDeclareRange.Len != 0 {
+		} else if opts.tsDeclareRange.Len != 0 {
 			p.log.AddError(&p.tracker, opts.tsDeclareRange, "\"declare\" cannot be used with a private identifier")
 		}
 		name := p.lexer.Identifier
diff --git a/internal/js_parser/ts_parser_test.go b/internal/js_parser/ts_parser_test.go
index 2c478e7d5a..7442a26933 100644
--- a/internal/js_parser/ts_parser_test.go
+++ b/internal/js_parser/ts_parser_test.go
@@ -890,16 +890,18 @@ func TestTSPrivateIdentifiers(t *testing.T) {
 	expectPrintedTS(t, "class Foo { static set #foo(x) {} }", "class Foo {\n  static set #foo(x) {\n  }\n}\n")
 
 	// Decorators are not valid on private members
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo = 1 }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec get #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec set #foo() {x} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo = 1 }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static get #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static set #foo() {x} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo = 1 }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec get #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec set #foo(x) {x} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec accessor #foo }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo = 1 }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static get #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static set #foo(x) {x} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static accessor #foo }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
 
 	// Decorators are now able to access private names, since the TypeScript
 	// compiler was changed to move them into a "static {}" block within the
@@ -1919,18 +1921,20 @@ func TestTSExperimentalDecorator(t *testing.T) {
 	expectParseErrorExperimentalDecoratorTS(t, "({ foo(@dec x) {} })", "<stdin>: ERROR: Expected identifier but found \"@\"\n")
 
 	// Decorators aren't allowed with private names
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo = 1 }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec *#foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec async #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec async* #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo = 1 }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static *#foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static async #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
-	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static async* #foo() {} }", "<stdin>: ERROR: Expected identifier but found \"#foo\"\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo = 1 }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec *#foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec async #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec async* #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec accessor #foo }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo = 1 }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static *#foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static async #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static async* #foo() {} }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
+	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec static accessor #foo }", "<stdin>: ERROR: TypeScript experimental decorators cannot be used on private identifiers\n")
 
 	// Decorators aren't allowed on class constructors
 	expectParseErrorExperimentalDecoratorTS(t, "class Foo { @dec constructor() {} }", "<stdin>: ERROR: Decorators are not allowed on class constructors\n")