diff --git a/packages/babel-helper-member-expression-to-functions/src/index.js b/packages/babel-helper-member-expression-to-functions/src/index.js
index 7724406d2b46..38c324731907 100644
--- a/packages/babel-helper-member-expression-to-functions/src/index.js
+++ b/packages/babel-helper-member-expression-to-functions/src/index.js
@@ -329,6 +329,8 @@ const handle = {
       return;
     }
 
+    // for (MEMBER of ARR)
+    // for (MEMBER in ARR)
     // { KEY: MEMBER } = OBJ -> { KEY: _destructureSet(MEMBER) } = OBJ
     // { KEY: MEMBER = _VALUE } = OBJ -> { KEY: _destructureSet(MEMBER) = _VALUE } = OBJ
     // {...MEMBER} -> {..._destructureSet(MEMBER)}
@@ -337,6 +339,9 @@ const handle = {
     // [MEMBER = _VALUE] = ARR -> [_destructureSet(MEMBER) = _VALUE] = ARR
     // [...MEMBER] -> [..._destructureSet(MEMBER)]
     if (
+      // for (MEMBER of ARR)
+      // for (MEMBER in ARR)
+      parentPath.isForXStatement({ left: node }) ||
       // { KEY: MEMBER } = OBJ
       (parentPath.isObjectProperty({ value: node }) &&
         parentPath.parentPath.isObjectPattern()) ||
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/private/1-helpermemberexpressionfunction/input.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/private/1-helpermemberexpressionfunction/input.js
new file mode 100644
index 000000000000..9defd1899e15
--- /dev/null
+++ b/packages/babel-plugin-proposal-class-properties/test/fixtures/private/1-helpermemberexpressionfunction/input.js
@@ -0,0 +1,27 @@
+class D {
+  #arr;
+  f() {
+    for (const el of this.#arr);
+  }
+}
+
+class C {
+  #p;
+  m() {
+    for (this.#p of []);
+  }
+}
+
+class E {
+  #arr;
+  f() {
+    for (this.#arr of [1, 2]);
+  }
+}
+
+class F {
+  #ar;
+  g() {
+    for (this.#ar in [1,2,3]);
+  }
+}
\ No newline at end of file
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/private/1-helpermemberexpressionfunction/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/private/1-helpermemberexpressionfunction/output.js
new file mode 100644
index 000000000000..c956f5663c4e
--- /dev/null
+++ b/packages/babel-plugin-proposal-class-properties/test/fixtures/private/1-helpermemberexpressionfunction/output.js
@@ -0,0 +1,99 @@
+var _arr = new WeakMap();
+
+var D = /*#__PURE__*/function () {
+  "use strict";
+
+  function D() {
+    babelHelpers.classCallCheck(this, D);
+
+    _arr.set(this, {
+      writable: true,
+      value: void 0
+    });
+  }
+
+  babelHelpers.createClass(D, [{
+    key: "f",
+    value: function f() {
+      for (var el of babelHelpers.classPrivateFieldGet(this, _arr)) {
+        ;
+      }
+    }
+  }]);
+  return D;
+}();
+
+var _p = new WeakMap();
+
+var C = /*#__PURE__*/function () {
+  "use strict";
+
+  function C() {
+    babelHelpers.classCallCheck(this, C);
+
+    _p.set(this, {
+      writable: true,
+      value: void 0
+    });
+  }
+
+  babelHelpers.createClass(C, [{
+    key: "m",
+    value: function m() {
+      for (babelHelpers.classPrivateFieldDestructureSet(this, _p).value of []) {
+        ;
+      }
+    }
+  }]);
+  return C;
+}();
+
+var _arr2 = new WeakMap();
+
+var E = /*#__PURE__*/function () {
+  "use strict";
+
+  function E() {
+    babelHelpers.classCallCheck(this, E);
+
+    _arr2.set(this, {
+      writable: true,
+      value: void 0
+    });
+  }
+
+  babelHelpers.createClass(E, [{
+    key: "f",
+    value: function f() {
+      for (babelHelpers.classPrivateFieldDestructureSet(this, _arr2).value of [1, 2]) {
+        ;
+      }
+    }
+  }]);
+  return E;
+}();
+
+var _ar = new WeakMap();
+
+var F = /*#__PURE__*/function () {
+  "use strict";
+
+  function F() {
+    babelHelpers.classCallCheck(this, F);
+
+    _ar.set(this, {
+      writable: true,
+      value: void 0
+    });
+  }
+
+  babelHelpers.createClass(F, [{
+    key: "g",
+    value: function g() {
+      for (babelHelpers.classPrivateFieldDestructureSet(this, _ar).value in [1, 2, 3]) {
+        ;
+      }
+    }
+  }]);
+  return F;
+}();