diff --git a/broccoli/debug-macros.js b/broccoli/debug-macros.js
index 6b250d26cdd..5b86d2f16b3 100644
--- a/broccoli/debug-macros.js
+++ b/broccoli/debug-macros.js
@@ -39,5 +39,9 @@ module.exports = function debugMacros(tree, environment) {
     ],
   ];
 
-  return new Babel(tree, { plugins });
+  let parserOpts = {
+    plugins: [['decorators', { decoratorsBeforeExport: true }]],
+  };
+
+  return new Babel(tree, { plugins, parserOpts });
 };
diff --git a/broccoli/to-named-amd.js b/broccoli/to-named-amd.js
index d309c2ef237..4fef2908426 100644
--- a/broccoli/to-named-amd.js
+++ b/broccoli/to-named-amd.js
@@ -27,6 +27,9 @@ module.exports = function processModulesOnly(tree, strict = false) {
       ['@babel/transform-modules-amd', transformOptions],
       enifed,
     ],
+    parserOpts: {
+      plugins: [['decorators', { decoratorsBeforeExport: true }]],
+    },
     moduleIds: true,
     getModuleId: getRelativeModulePath,
   };