diff --git a/pynapple/core/time_series.py b/pynapple/core/time_series.py
index f7c43f87..6cc446d5 100644
--- a/pynapple/core/time_series.py
+++ b/pynapple/core/time_series.py
@@ -471,7 +471,8 @@ def convolve(self, array, ep=None, trim="both"):
         Parameters
         ----------
         array : array-like
-
+            One dimensional input array-like.
+            
         ep : None, optional
             The epochs to apply the convolution
         trim : str, optional