diff --git a/egs/librilight/SSL/zipformer/ssl_datamodule.py b/egs/librilight/SSL/zipformer/ssl_datamodule.py
index e32bedaf6..7d38a89b0 100644
--- a/egs/librilight/SSL/zipformer/ssl_datamodule.py
+++ b/egs/librilight/SSL/zipformer/ssl_datamodule.py
@@ -98,7 +98,7 @@ class LibriLightDataModule:
         )
         group.add_argument(
             "--num-cuts-for-bins-estimate",
-            type=float,
+            type=int,
             default=1000000,
             help="We will draw this many cuts to estimate the duration"
             "bins for creating similar-duration buckets. Larger number"