diff --git a/pyteltools/slf/Serafin.py b/pyteltools/slf/Serafin.py
index 56707ba..ee8e968 100755
--- a/pyteltools/slf/Serafin.py
+++ b/pyteltools/slf/Serafin.py
@@ -215,7 +215,7 @@ def build_params(self):
             0,
             0,
             self.nb_planes,
-            self.nb_elements,
+            0,
             0,
             0 if self.date is None else 1
         )