diff --git a/train.py b/train.py
index 04292736..9f21b190 100644
--- a/train.py
+++ b/train.py
@@ -386,7 +386,7 @@ if __name__ == '__main__':
     parser.add_argument('--accumulate', type=int, default=4, help='batches to accumulate before optimizing')
     parser.add_argument('--cfg', type=str, default='cfg/yolov3-spp.cfg', help='*.cfg path')
     parser.add_argument('--data', type=str, default='data/coco2017.data', help='*.data path')
-    parser.add_argument('--multi-scale', action='store_true', help='adjust (67% - 150%) img_size every 10 batches')
+    parser.add_argument('--multi-scale', action='store_true', help='adjust (67%% - 150%%) img_size every 10 batches')
     parser.add_argument('--img-size', nargs='+', type=int, default=[416], help='train and test image-sizes')
     parser.add_argument('--rect', action='store_true', help='rectangular training')
     parser.add_argument('--resume', action='store_true', help='resume training from last.pt')