diff --git a/pynapple/core/base_class.py b/pynapple/core/base_class.py
index 303fc5c3a..566c24bfc 100644
--- a/pynapple/core/base_class.py
+++ b/pynapple/core/base_class.py
@@ -215,7 +215,7 @@ def value_from(self, data, ep=None, mode="closest"):
 
         return data._define_instance(time_index=t, time_support=time_support, values=d)
 
-    def count(self, bin_size=None, ep=None, time_units="s", dtype=None):
+    def count(self, bins=None, ep=None, time_units="s", dtype=None):
         """
         Count occurences of events within bin_size or within a set of bins defined as an IntervalSet.
         You can call this function in multiple ways :