diff --git a/src/library_nodefs.js b/src/library_nodefs.js
index bdc643b1ac198..fd22eb4f65705 100644
--- a/src/library_nodefs.js
+++ b/src/library_nodefs.js
@@ -5,7 +5,7 @@
 
 mergeInto(LibraryManager.library, {
   $NODEFS__deps: ['$FS', '$PATH'],
-  $NODEFS__postset: 'if (ENVIRONMENT_IS_NODE) { var fs = require("fs"); var NODEJS_PATH = require("path"); NODEFS.staticInit(); }',
+  $NODEFS__postset: 'if (ENVIRONMENT_HAS_NODE) { var fs = require("fs"); var NODEJS_PATH = require("path"); NODEFS.staticInit(); }',
   $NODEFS: {
     isWindows: false,
     staticInit: function() {
@@ -33,7 +33,7 @@ mergeInto(LibraryManager.library, {
       return Buffer.alloc ? Buffer.from(arrayBuffer) : new Buffer(arrayBuffer);
     },
     mount: function (mount) {
-      assert(ENVIRONMENT_IS_NODE);
+      assert(ENVIRONMENT_HAS_NODE);
       return NODEFS.createNode(null, '/', NODEFS.getMode(mount.opts.root), 0);
     },
     createNode: function (parent, name, mode, dev) {
diff --git a/src/shell.js b/src/shell.js
index 4c73ccde75df0..b10ba3c9c9a39 100644
--- a/src/shell.js
+++ b/src/shell.js
@@ -58,15 +58,18 @@ Module['postRun'] = [];
 var ENVIRONMENT_IS_WEB = {{{ ENVIRONMENT === 'web' }}};
 var ENVIRONMENT_IS_WORKER = {{{ ENVIRONMENT === 'worker' }}};
 var ENVIRONMENT_IS_NODE = {{{ ENVIRONMENT === 'node' }}};
+var ENVIRONMENT_HAS_NODE = ENVIRONMENT_IS_NODE;
 var ENVIRONMENT_IS_SHELL = {{{ ENVIRONMENT === 'shell' }}};
 #else // ENVIRONMENT
 var ENVIRONMENT_IS_WEB = false;
 var ENVIRONMENT_IS_WORKER = false;
 var ENVIRONMENT_IS_NODE = false;
+var ENVIRONMENT_HAS_NODE = false;
 var ENVIRONMENT_IS_SHELL = false;
 ENVIRONMENT_IS_WEB = typeof window === 'object';
 ENVIRONMENT_IS_WORKER = typeof importScripts === 'function';
-ENVIRONMENT_IS_NODE = typeof process === 'object' && typeof require === 'function' && !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_WORKER;
+ENVIRONMENT_HAS_NODE = typeof process === 'object' && typeof require === 'function';
+ENVIRONMENT_IS_NODE = ENVIRONMENT_HAS_NODE && !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_WORKER;
 ENVIRONMENT_IS_SHELL = !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_NODE && !ENVIRONMENT_IS_WORKER;
 #endif // ENVIRONMENT