diff --git a/README.md b/README.md
index 70436271dd..c92c252395 100644
--- a/README.md
+++ b/README.md
@@ -230,7 +230,7 @@ python data_prep/convert_dataset_hf.py \
 # Train an MPT-125m model for 10 batches
 composer train/train.py \
   train/yamls/pretrain/mpt-125m.yaml \
-  data_local=my-copy-c4 \
+  variables.data_local=my-copy-c4 \
   train_loader.dataset.split=train_small \
   eval_loader.dataset.split=val_small \
   max_duration=10ba \