diff --git a/fine_tune.py b/fine_tune.py
index f901ee64..85febeaa 100644
--- a/fine_tune.py
+++ b/fine_tune.py
@@ -251,6 +251,11 @@ def train(args):
 
     if args.deepspeed:
         # wrapping model
+        import deepspeed
+        if args.offload_optimizer_device is not None:
+            accelerator.print('[DeepSpeed] start to manually build cpu_adam.')
+            deepspeed.ops.op_builder.CPUAdamBuilder().load()
+            accelerator.print('[DeepSpeed] building cpu_adam done.')
         class DeepSpeedModel(torch.nn.Module): 
             def __init__(self, unet, text_encoder) -> None:
                 super().__init__()
diff --git a/train_db.py b/train_db.py
index fa7f6a8d..e2661886 100644
--- a/train_db.py
+++ b/train_db.py
@@ -224,6 +224,11 @@ def train(args):
     # acceleratorがなんかよろしくやってくれるらしい
     if args.deepspeed:
         # wrapping model
+        import deepspeed
+        if args.offload_optimizer_device is not None:
+            accelerator.print('[DeepSpeed] start to manually build cpu_adam.')
+            deepspeed.ops.op_builder.CPUAdamBuilder().load()
+            accelerator.print('[DeepSpeed] building cpu_adam done.')
         class DeepSpeedModel(torch.nn.Module): 
             def __init__(self, unet, text_encoder) -> None:
                 super().__init__()
diff --git a/train_network.py b/train_network.py
index bbda427a..050a6511 100644
--- a/train_network.py
+++ b/train_network.py
@@ -419,6 +419,11 @@ class NetworkTrainer:
         # acceleratorがなんかよろしくやってくれるらしい / accelerator will do something good
         if args.deepspeed:
             # wrapping model
+            import deepspeed
+            if args.offload_optimizer_device is not None:
+                accelerator.print('[DeepSpeed] start to manually build cpu_adam.')
+                deepspeed.ops.op_builder.CPUAdamBuilder().load()
+                accelerator.print('[DeepSpeed] building cpu_adam done.')
             class DeepSpeedModel(torch.nn.Module): 
                 def __init__(self, unet, text_encoder, network) -> None:
                     super().__init__()