diff --git a/pysindy/pysindy.py b/pysindy/pysindy.py
index b0061f77f..ae182d900 100644
--- a/pysindy/pysindy.py
+++ b/pysindy/pysindy.py
@@ -535,6 +535,10 @@ def differentiate(self, x, t=None):
             Time derivatives computed by using the model's differentiation
             method
         """
+        warnings.warn(
+            "SINDy.differentiate is deprecated.  "
+            "Call the differentiation_method parameter"
+        )
         if t is None:
             t = self.t_default
         if self.discrete_time: