diff --git a/lib/build/amodro-trace/write/replace.js b/lib/build/amodro-trace/write/replace.js
index 4c7c3b358..fb4a58199 100644
--- a/lib/build/amodro-trace/write/replace.js
+++ b/lib/build/amodro-trace/write/replace.js
@@ -11,6 +11,8 @@ const astMatcher = require('../../ast-matcher').astMatcher;
 // it is definitely a named AMD module at this stage
 var amdDep = astMatcher('define(__str, [__anl_deps], __any)');
 var cjsDep = astMatcher('require(__any_dep)');
+var isUMD = astMatcher('typeof define === "function" && define.amd');
+var isUMD2 = astMatcher('typeof define == "function" && define.amd');
 
 module.exports = function stubs(options) {
   options = options || {};
@@ -48,6 +50,12 @@ module.exports = function stubs(options) {
     // need node location
     const parsed = esprima.parse(contents, {range: true});
 
+    if (isUMD(parsed) || isUMD2(parsed)) {
+      // Skip lib in umd format, because browersify umd build could
+      // use require('./file.js') which we should not strip .js
+      return contents;
+    }
+
     const amdMatch = amdDep(parsed);
     if (amdMatch) {
       amdMatch.forEach(result => {
diff --git a/package-lock.json b/package-lock.json
index 48fc4f625..a8b4afc83 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6931,7 +6931,7 @@
     "split": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/split/-/split-1.0.1.tgz",
-      "integrity": "sha1-YFvZvjA6pZ+zX5Ip++oN3snqB9k=",
+      "integrity": "sha512-mTyOoPbrivtXnwnIxZRFYRrPNtEFKlpB2fvjSnCQUiAA6qAZzqwna5envK4uk6OIeP17CsdF3rSBGYVBsU0Tkg==",
       "dev": true,
       "requires": {
         "through": "2"
@@ -6948,7 +6948,7 @@
     "split2": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/split2/-/split2-2.2.0.tgz",
-      "integrity": "sha1-GGsldbz4PoW30YRldWI47k7kJJM=",
+      "integrity": "sha512-RAb22TG39LhI31MbreBgIuKiIKhVsawfTgEGqKHTK87aG+ul/PB8Sqoi3I7kVdRWiCfrKxK3uo4/YUkpNvhPbw==",
       "dev": true,
       "requires": {
         "through2": "^2.0.2"
diff --git a/spec/lib/build/bundled-source.spec.js b/spec/lib/build/bundled-source.spec.js
index 611a77177..ae43fddfa 100644
--- a/spec/lib/build/bundled-source.spec.js
+++ b/spec/lib/build/bundled-source.spec.js
@@ -741,6 +741,48 @@ export {t};
       .toBe("define('foo/index',['require','exports','module','pack-name.js','@pack/name.js','pack-name.js/foo','@pack/name.js/foo','./bar'],function (require, exports, module) {require('pack-name.js'); require('@pack/name.js'); require('pack-name.js/foo'); require('@pack/name.js/foo'); require('./bar');});");
   });
 
+  it('does not clears up deps with ".js" for browserify umd build', () => {
+    const umd = `(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.foo = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
+module.exports = 'bar';
+
+},{}],2:[function(require,module,exports){
+module.exports = require('./bar.js');
+},{"./bar.js":1}]},{},[2])(2)
+});
+`;
+    let file = {
+      path: path.resolve(cwd, 'node_modules/foo/index.js'),
+      contents: umd
+    };
+
+    let bs = new BundledSource(bundler, file);
+    bs._getProjectRoot = () => 'src';
+    bs.includedBy = {
+      includedBy: {
+        description: {
+          name: 'foo',
+          mainId: 'foo/index',
+          loaderConfig: {
+            name: 'foo',
+            path: '../node_modules/foo',
+            main: 'index'
+          },
+          browserReplacement: () => undefined
+        }
+      }
+    };
+    bs._getLoaderPlugins = () => [];
+    bs._getLoaderConfig = () => ({paths: {}});
+    bs._getUseCache = () => undefined;
+
+    let deps = bs.transform();
+    expect(deps).toBeUndefined();
+    expect(bs.requiresTransform).toBe(false);
+    expect(bs.contents).toContain("define('foo/index',[]");
+    expect(bs.contents).toContain("require('./bar.js')");
+  });
+
+
   describe('cache', () => {
     let oldGetCache;
     let oldSetCache;