diff --git a/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py b/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py
index f5a40d402..c138da451 100644
--- a/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py
@@ -695,7 +695,7 @@ class Zipformer2Encoder(nn.Module):
     ) -> None:
         super().__init__()
         self.encoder_pos = CompactRelPositionalEncoding(pos_dim, dropout_rate=0.15,
-                                                        length_factor=3.0)
+                                                        length_factor=1.0)
 
         self.layers = nn.ModuleList(
             [copy.deepcopy(encoder_layer) for i in range(num_layers)]