diff --git a/train.py b/train.py
index da102e4d..d0fbd837 100644
--- a/train.py
+++ b/train.py
@@ -29,6 +29,7 @@ def train(
 
     if multi_scale:
         img_size = 608  # initiate with maximum multi_scale size
+        num_workers = 0  # bug https://github.com/ultralytics/yolov3/issues/174
     else:
         torch.backends.cudnn.benchmark = True  # unsuitable for multiscale