diff --git a/egs/libriheavy/TTS/local/prepare_manifest.py b/egs/libriheavy/TTS/local/prepare_manifest.py
index 65d442f3a2..aa3e04e1ce 100755
--- a/egs/libriheavy/TTS/local/prepare_manifest.py
+++ b/egs/libriheavy/TTS/local/prepare_manifest.py
@@ -279,6 +279,7 @@ def __call__(self, cut):
             return None
 
         text = self.en_tn_model.normalize(text)
+        text = re.sub(r"\s+", " ", text).strip()
 
         cut["supervisions"][0]["text"] = text
         del cut["supervisions"][0]["custom"]