1 files changed, 7 insertions, 2 deletions
diff --git a/src/mongo/shell/utils.js b/src/mongo/shell/utils.js
index 2c48a3c24d6..41735768dd8 100644
--- a/src/mongo/shell/utils.js
+++ b/src/mongo/shell/utils.js
@@ -594,16 +594,21 @@ if (typeof(_useWriteCommandsDefault) == 'undefined') {
     _useWriteCommandsDefault = function() { return false; };
 };
 
+if (typeof(_writeMode) == 'undefined') {
+    // This is for cases when the v8 engine is used other than the mongo shell, like map reduce.
+    _writeMode = function() { return "commands"; };
+};
+
 shellPrintHelper = function (x) {
     if (typeof (x) == "undefined") {
         // Make sure that we have a db var before we use it
         // TODO: This implicit calling of GLE can cause subtle, hard to track issues - remove?
         if (__callLastError && typeof( db ) != "undefined" &&
                 db.getMongo &&
-                !db.getMongo().useWriteCommands) {
+                db.getMongo().writeMode == "legacy") {
 
             __callLastError = false;
-            // explicit w:1 so that replset getLastErrorDefaults aren't used here which would be bad.
+            // explicit w:1 so that replset getLastErrorDefaults aren't used here which would be bad
             var err = db.getLastError(1);
             if (err != null) {
                 print(err);