diff --git a/asteroid/data/librimix_dataset.py b/asteroid/data/librimix_dataset.py
index 33105e641..429168e80 100644
--- a/asteroid/data/librimix_dataset.py
+++ b/asteroid/data/librimix_dataset.py
@@ -89,7 +89,7 @@ def __getitem__(self, idx):
         sources_list = []
         # If there is a seg start point is set randomly
         if self.seg_len is not None:
-            start = random.randint(0, row["length"] - self.seg_len)
+            start = random.randint(0, int(row["length"] - self.seg_len))
             stop = start + self.seg_len
         else:
             start = 0