diff --git a/src/babel/transformation/modules/_default.js b/src/babel/transformation/modules/_default.js
index cdcf45a616..b383b638a5 100644
--- a/src/babel/transformation/modules/_default.js
+++ b/src/babel/transformation/modules/_default.js
@@ -93,7 +93,9 @@ export default class DefaultFormatter {
 
     this.getLocalExports();
     this.getLocalImports();
+  }
 
+  init() {
     this.remapAssignments();
   }
 
diff --git a/src/babel/transformation/modules/common.js b/src/babel/transformation/modules/common.js
index a1b1dbaccf..053ff1bae5 100644
--- a/src/babel/transformation/modules/common.js
+++ b/src/babel/transformation/modules/common.js
@@ -15,6 +15,8 @@ export default class CommonJSFormatter extends DefaultFormatter {
       if (this.file.isLoose("es6.modules")) templateName += "-loose";
       file.ast.program.body.unshift(util.template(templateName, true));
     }
+
+    DefaultFormatter.prototype.init.call(this);
   };
 
   importSpecifier(specifier, node, nodes) {
diff --git a/src/babel/transformation/modules/system.js b/src/babel/transformation/modules/system.js
index 835a344a24..7938be5c68 100644
--- a/src/babel/transformation/modules/system.js
+++ b/src/babel/transformation/modules/system.js
@@ -94,7 +94,9 @@ export default class SystemFormatter extends AMDFormatter {
     DefaultFormatter.apply(this, arguments);
   }
 
-  init() {}
+  init() {
+    DefaultFormatter.prototype.init.call(this);
+  }
 
   _addImportSource(node, exportNode) {
     node._importSource = exportNode.source && exportNode.source.value;