diff --git a/crates/ml-dqn/src/dqn.rs b/crates/ml-dqn/src/dqn.rs
index ac2be9068..1d30f9bda 100644
--- a/crates/ml-dqn/src/dqn.rs
+++ b/crates/ml-dqn/src/dqn.rs
@@ -3348,7 +3348,7 @@ impl DQN {
         let result = self.compute_loss_internal(batch)?;
 
         // Backward + clip WITHOUT optimizer step — zero GPU→CPU sync
-        let (grads, grad_norm_tensor) = if let Some(ref optimizer) = self.optimizer {
+        let (grads, _grad_norm_tensor) = if let Some(ref optimizer) = self.optimizer {
             optimizer.backward_and_clip(&result.loss_tensor, self.gradient_clip_norm)?
         } else {
             return Err(MLError::TrainingError(
@@ -3358,10 +3358,10 @@ impl DQN {
 
         // Squeeze grad_norm from [1] → rank-0 scalar tensor (GPU path only)
         #[cfg(feature = "cuda")]
-        let grad_norm_scalar_tensor = if grad_norm_tensor.dims().len() > 0 {
-            grad_norm_tensor.squeeze(0)?
+        let grad_norm_scalar_tensor = if _grad_norm_tensor.dims().len() > 0 {
+            _grad_norm_tensor.squeeze(0)?
         } else {
-            grad_norm_tensor
+            _grad_norm_tensor
         };
 
         Ok(GradientResult {