diff --git a/crates/oxc_transformer/src/options/env.rs b/crates/oxc_transformer/src/options/env.rs
index 8d1011897894a..eee0aa4586115 100644
--- a/crates/oxc_transformer/src/options/env.rs
+++ b/crates/oxc_transformer/src/options/env.rs
@@ -139,7 +139,9 @@ impl EnvOptions {
             }
         }
         engine_targets.insert(Engine::Es, es_target.unwrap_or(ESTarget::default()).version());
-        Ok(EnvOptions::from(engine_targets))
+        let mut env_options = EnvOptions::from(engine_targets);
+        env_options.es2022.class_properties = None;
+        Ok(env_options)
     }
 }
 
diff --git a/crates/oxc_transformer/tests/integrations/es_target.rs b/crates/oxc_transformer/tests/integrations/es_target.rs
index 53c07e631f381..29cf0d1aa5726 100644
--- a/crates/oxc_transformer/tests/integrations/es_target.rs
+++ b/crates/oxc_transformer/tests/integrations/es_target.rs
@@ -19,6 +19,7 @@ fn es_target() {
         ("es2020", "a ||= b"),
         ("es2019", "1n ** 2n"), // test target error
         ("es2021", "class foo { static {} }"),
+        ("es2021", "class Foo { #a; }"), // Plugin not ready
     ];
 
     // Test no transformation for esnext.
diff --git a/crates/oxc_transformer/tests/integrations/snapshots/es_target.snap b/crates/oxc_transformer/tests/integrations/snapshots/es_target.snap
index 639b97e1269cd..29cc25b059a85 100644
--- a/crates/oxc_transformer/tests/integrations/snapshots/es_target.snap
+++ b/crates/oxc_transformer/tests/integrations/snapshots/es_target.snap
@@ -74,5 +74,13 @@ a || (a = b);
 ########## 9 es2021
 class foo { static {} }
 ----------
-class foo {}
-(() => {})();
+class foo {
+	static #_ = (() => {})();
+}
+
+########## 10 es2021
+class Foo { #a; }
+----------
+class Foo {
+	#a;
+}
diff --git a/napi/transform/test/transform.test.ts b/napi/transform/test/transform.test.ts
index e3505aa1de6e1..ae93af02b607e 100644
--- a/napi/transform/test/transform.test.ts
+++ b/napi/transform/test/transform.test.ts
@@ -75,6 +75,14 @@ describe('target', () => {
     assert(ret.code);
     assert.equal(ret.code, code);
   });
+
+  it('should turn off class propertiers because plugin is not ready', () => {
+    const code = 'class Foo {\n\t#a;\n}\n';
+    const ret = transform('test.js', code, { target: 'es2015' });
+    assert(ret.errors.length == 0);
+    assert(ret.code);
+    assert.equal(ret.code, code);
+  });
 });
 
 describe('modules', () => {