diff --git a/egs/librispeech/ASR/zipformer/jit_pretrained_ctc.py b/egs/librispeech/ASR/zipformer/jit_pretrained_ctc.py
index a019803c6..904d8cd76 100755
--- a/egs/librispeech/ASR/zipformer/jit_pretrained_ctc.py
+++ b/egs/librispeech/ASR/zipformer/jit_pretrained_ctc.py
@@ -411,7 +411,7 @@ def main():
 
     s = "\n"
     for filename, hyp in zip(params.sound_files, hyps):
-        words = "".join(hyp)
+        words = " ".join(hyp)
         words = words.replace("▁", " ").strip()
         s += f"{filename}:\n{words}\n\n"
     logging.info(s)
diff --git a/egs/librispeech/ASR/zipformer/pretrained_ctc.py b/egs/librispeech/ASR/zipformer/pretrained_ctc.py
index 5494aefbd..3508978d8 100755
--- a/egs/librispeech/ASR/zipformer/pretrained_ctc.py
+++ b/egs/librispeech/ASR/zipformer/pretrained_ctc.py
@@ -430,7 +430,7 @@ def main():
 
     s = "\n"
     for filename, hyp in zip(params.sound_files, hyps):
-        words = "".join(hyp)
+        words = " ".join(hyp)
         words = words.replace("▁", " ").strip()
         s += f"{filename}:\n{words}\n\n"
     logging.info(s)