diff --git a/metastable_baselines2/trpl/trpl.py b/metastable_baselines2/trpl/trpl.py
index c1329e8..5b85692 100644
--- a/metastable_baselines2/trpl/trpl.py
+++ b/metastable_baselines2/trpl/trpl.py
@@ -253,8 +253,12 @@ class TRPL(BetterOnPolicyAlgorithm):
 
                 # Logging
                 pg_losses.append(surrogate_loss.item())
-                clip_fraction = th.mean((th.abs(ratio - 1) > clip_range).float()).item()
+                if self.clip_range is not None:
+                    clip_fraction = th.mean((th.abs(ratio - 1) > clip_range).float()).item()
+                else:
+                    clip_fraction = 0
                 clip_fractions.append(clip_fraction)
+                
 
                 if self.clip_range_vf is None:
                     # No clipping