diff --git a/packages/commonjs/src/transform-commonjs.js b/packages/commonjs/src/transform-commonjs.js
index 543336cd9..4601094e9 100644
--- a/packages/commonjs/src/transform-commonjs.js
+++ b/packages/commonjs/src/transform-commonjs.js
@@ -291,13 +291,16 @@ export default async function transformCommonjs(
           return;
         case 'Identifier': {
           const { name } = node;
-          if (!isReference(node, parent) || scope.contains(name)) return;
-          const isClassBodyPropertyKey =
-            parent.type === 'PropertyDefinition' && parent.key === node;
+          if (
+            !isReference(node, parent) ||
+            scope.contains(name) ||
+            (parent.type === 'PropertyDefinition' && parent.key === node)
+          )
+            return;
           switch (name) {
             case 'require':
               uses.require = true;
-              if (isNodeRequirePropertyAccess(parent) || isClassBodyPropertyKey) {
+              if (isNodeRequirePropertyAccess(parent)) {
                 return;
               }
               if (!ignoreDynamicRequires) {
@@ -318,14 +321,10 @@ export default async function transformCommonjs(
             case 'global':
               uses.global = true;
               if (!ignoreGlobal) {
-                if (isClassBodyPropertyKey && !parent.value) {
-                  magicString.prependLeft(node.start, 'global = ');
-                }
                 replacedGlobal.push(node);
               }
               return;
             case 'define':
-              if (isClassBodyPropertyKey) return;
               magicString.overwrite(node.start, node.end, 'undefined', {
                 storeName: true
               });
diff --git a/packages/commonjs/test/snapshots/function.js.md b/packages/commonjs/test/snapshots/function.js.md
index 5e6c0d462..2c31aab43 100644
--- a/packages/commonjs/test/snapshots/function.js.md
+++ b/packages/commonjs/test/snapshots/function.js.md
@@ -250,14 +250,12 @@ Generated by [AVA](https://avajs.dev).
       ␊
       Object.defineProperty(exports, '__esModule', { value: true });␊
       ␊
-      var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};␊
-      ␊
       var main = {};␊
       ␊
       class Rollup {␊
         define;␊
         require;␊
-        global = commonjsGlobal;␊
+        global;␊
       }␊
       ␊
       var Rollup_1 = main.Rollup = Rollup;␊
diff --git a/packages/commonjs/test/snapshots/function.js.snap b/packages/commonjs/test/snapshots/function.js.snap
index 5361b8c84..97a1e03b0 100644
Binary files a/packages/commonjs/test/snapshots/function.js.snap and b/packages/commonjs/test/snapshots/function.js.snap differ