diff --git a/examples/run_ner.py b/examples/run_ner.py
index 00eb039258..28d9e9db28 100644
--- a/examples/run_ner.py
+++ b/examples/run_ner.py
@@ -210,6 +210,9 @@ def evaluate(args, model, tokenizer, labels, pad_token_label_id, mode, prefix=""
             outputs = model(**inputs)
             tmp_eval_loss, logits = outputs[:2]
 
+            if args.n_gpu > 1:
+                tmp_eval_loss = tmp_eval_loss.mean()  # mean() to average on multi-gpu parallel evaluating
+
             eval_loss += tmp_eval_loss.item()
         nb_eval_steps += 1
         if preds is None: