diff --git a/optimum/bettertransformer/models/encoder_models.py b/optimum/bettertransformer/models/encoder_models.py
index 20f7f4de50c..6a358100b2a 100644
--- a/optimum/bettertransformer/models/encoder_models.py
+++ b/optimum/bettertransformer/models/encoder_models.py
@@ -1833,7 +1833,7 @@ def forward(self, hidden_states, attention_mask, causal_attention_mask, output_a
                 attention_mask,
             )
         else:
-            NotImplementedError(
+            raise NotImplementedError(
                 "Training and Autocast are not implemented for BetterTransformer + CLIP. Please open an issue."
             )