diff --git a/egs/librispeech/ASR/pruned_transducer_stateless3/decode-giga.py b/egs/librispeech/ASR/pruned_transducer_stateless3/decode-giga.py
index c04029c7f..e6a9a0aee 100755
--- a/egs/librispeech/ASR/pruned_transducer_stateless3/decode-giga.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless3/decode-giga.py
@@ -520,6 +520,11 @@ def main():
     model.eval()
     model.device = device
 
+    # In beam_search.py, we are using model.decoder() and model.joiner(),
+    # so we have to switch to the branch for the GigaSpeech dataset.
+    model.decoder = model.decoder_giga
+    model.joiner = model.joiner_giga
+
     if params.decoding_method == "fast_beam_search":
         decoding_graph = k2.trivial_graph(params.vocab_size - 1, device=device)
     else: