diff --git a/lib/cli.js b/lib/cli.js
index 338a23827..6c2ba07f4 100755
--- a/lib/cli.js
+++ b/lib/cli.js
@@ -145,6 +145,9 @@ cli.generateParserString = function generateParserString(opts, grammar) {
     if (opts.moduleName) {
         settings.moduleName = opts.moduleName;
     }
+    if (opts.moduleMain) {
+        settings.moduleMain = opts.moduleMain;
+    }
     settings.debug = opts.debug;
     if (!settings.moduleType) {
         settings.moduleType = opts['module-type'];