diff --git a/metastable_baselines2/trpl/trpl.py b/metastable_baselines2/trpl/trpl.py
index ed819b1..043341a 100644
--- a/metastable_baselines2/trpl/trpl.py
+++ b/metastable_baselines2/trpl/trpl.py
@@ -186,7 +186,8 @@ class TRPL(BetterOnPolicyAlgorithm):
         super()._setup_model()
 
         # Initialize schedules for policy/value clipping
-        self.clip_range = get_schedule_fn(self.clip_range)
+        if self.clip_range is not None:
+            self.clip_range = get_schedule_fn(self.clip_range)
         if self.clip_range_vf is not None:
             if isinstance(self.clip_range_vf, (float, int)):
                 assert self.clip_range_vf > 0, "`clip_range_vf` must be positive, " "pass `None` to deactivate vf clipping"