diff --git a/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py b/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py
index 232c0d4c8..ff31c3125 100644
--- a/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py
@@ -1193,7 +1193,7 @@ class SelfAttention(nn.Module):
     Args:
           embed_dim: the input and output embedding dimension
           num_heads: the number of attention heads
-          value_dim: the value dimension per head
+          value_head_dim: the value dimension per head
     """
     def __init__(
             self,