diff --git a/lib/build/bundled-source.js b/lib/build/bundled-source.js
index 4e3faf700..b0737e459 100644
--- a/lib/build/bundled-source.js
+++ b/lib/build/bundled-source.js
@@ -116,11 +116,6 @@ exports.BundledSource = class {
       let contents = cjsTransform(modulePath, this.contents, forceCjsWrap);
       deps = findDeps(modulePath, contents);
 
-      const writeTransform = allWriteTransforms({
-        stubModules: loaderConfig.stubModules,
-        wrapShim: loaderConfig.wrapShim
-      });
-
       let context = {pkgsMainMap: {}, config: {shim: {}}};
       let desc = dependencyInclusion && dependencyInclusion.description;
       if (desc && desc.mainId === moduleId) {
@@ -128,6 +123,7 @@ exports.BundledSource = class {
         context.pkgsMainMap[moduleId] = desc.name;
       }
 
+      let wrapShim = false;
       if (dependencyInclusion) {
         let description = dependencyInclusion.description;
 
@@ -142,8 +138,17 @@ exports.BundledSource = class {
           // force deps for shimed package
           deps.push.apply(deps, description.loaderConfig.deps);
         }
+
+        if (description.loaderConfig.wrapShim) {
+          wrapShim = true;
+        }
       }
 
+      const writeTransform = allWriteTransforms({
+        stubModules: loaderConfig.stubModules,
+        wrapShim: wrapShim || loaderConfig.wrapShim
+      });
+
       contents = writeTransform(context, moduleId, modulePath, contents);
       this.contents = contents;
     }
diff --git a/spec/lib/build/bundled-source.spec.js b/spec/lib/build/bundled-source.spec.js
index 0942a0c37..4746737fa 100644
--- a/spec/lib/build/bundled-source.spec.js
+++ b/spec/lib/build/bundled-source.spec.js
@@ -463,6 +463,40 @@ exports.t = t;
       .toBe('(function(root) {define("foo/foo", ["bar"], function() {  return (function() {var Foo = "Foo";return root.Foo = Foo;  }).apply(root, arguments);});}(this));');
   });
 
+  it('transforms npm package legacy js file with per package wrapShim', () => {
+    let file = {
+      path: path.resolve(cwd, 'node_modules/foo/foo.js'),
+      contents: 'var Foo = "Foo";'
+    };
+
+    let bs = new BundledSource(bundler, file);
+    bs._getProjectRoot = () => 'src';
+    bs.includedBy = {
+      includedBy: {
+        description: {
+          name: 'foo',
+          mainId: 'foo/foo',
+          loaderConfig: {
+            name: 'foo',
+            path: '../node_modules/foo',
+            main: 'foo',
+            deps: ['bar'],
+            'exports': 'Foo',
+            wrapShim: true
+          }
+        }
+      }
+    };
+    bs._getLoaderPlugins = () => [];
+    bs._getLoaderConfig = () => ({paths: {}});
+
+    let deps = bs.transform();
+    expect(deps).toEqual(['bar']);
+    expect(bs.requiresTransform).toBe(false);
+    expect(bs.contents.replace(/\r|\n/g, ''))
+      .toBe('(function(root) {define("foo/foo", ["bar"], function() {  return (function() {var Foo = "Foo";return root.Foo = Foo;  }).apply(root, arguments);});}(this));');
+  });
+
   it('transforms npm package legacy js file with wrapShim but no exports', () => {
     let file = {
       path: path.resolve(cwd, 'node_modules/foo/foo.js'),