diff --git a/examples/GaAN/train.py b/examples/GaAN/train.py
index 6a8f905e158b21222bef67cd0dc4c6232113c42c..3c7a33929b05641f5943ff2d210dd4fd0a8b19e9 100644
--- a/examples/GaAN/train.py
+++ b/examples/GaAN/train.py
@@ -35,7 +35,7 @@ if __name__ == "__main__":
                        help="use a small dataset to test the code")
     parser.add_argument("--use_gpu", type=bool, choices=[True, False], default=True,
                        help="use gpu")
-    parser.add_argument("--gpu_id", type=int, default=4,
+    parser.add_argument("--gpu_id", type=int, default=0,
                        help="the id of gpu")
     parser.add_argument("--exp_id", type=int, default=0,
                        help="the id of experiment")