diff --git a/src/twinkle/processor/base.py b/src/twinkle/processor/base.py
index fe9733f1..ff0fbabf 100644
--- a/src/twinkle/processor/base.py
+++ b/src/twinkle/processor/base.py
@@ -105,6 +105,9 @@ def to_tensor(_input):
 
     def pad_cp(self, inputs: List[InputFeature], **kwargs) -> List[InputFeature]:
 
+        if self.device_mesh is None:
+            return inputs
+
         def _pad_cp(_input: InputFeature) -> InputFeature:
             # Pad sequence for parallel compatibility
             # 1. For CP > 1: Megatron's RoPE requires seq_len % (2 * cp_size) == 0