diff --git a/CHANGELOG.md b/CHANGELOG.md
index e3c2a33469f3b..7bc448667a86e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -43,6 +43,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Logging only on `not should_accumulate()` during training ([#5417](https://github.com/PyTorchLightning/pytorch-lightning/pull/5417))
 - Resolve interpolation bug with Hydra ([#5406](https://github.com/PyTorchLightning/pytorch-lightning/pull/5406))
 - Check environ before selecting a seed to prevent warning message ([#4743](https://github.com/PyTorchLightning/pytorch-lightning/pull/4743))
+- Fixed signature mismatch in `model_to_device` of `DDPCPUHPCAccelerator` ([#5505](https://github.com/PyTorchLightning/pytorch-lightning/pull/5505))
 
 
 ## [1.1.3] - 2021-01-05
diff --git a/pytorch_lightning/accelerators/ddp_cpu_hpc_accelerator.py b/pytorch_lightning/accelerators/ddp_cpu_hpc_accelerator.py
index b9a71ed271744..4694a31438ca6 100644
--- a/pytorch_lightning/accelerators/ddp_cpu_hpc_accelerator.py
+++ b/pytorch_lightning/accelerators/ddp_cpu_hpc_accelerator.py
@@ -42,7 +42,7 @@ def __init__(self,
         super().__init__(trainer, cluster_environment, ddp_plugin)
         self.nickname = 'ddp_cpu'
 
-    def model_to_device(self, model, process_idx):
+    def model_to_device(self, model):
         model.cpu()
 
     def get_device_ids(self):