diff --git a/utils/models/cogagent_model.py b/utils/models/cogagent_model.py
index fc4967d0..4c104fe6 100644
--- a/utils/models/cogagent_model.py
+++ b/utils/models/cogagent_model.py
@@ -36,7 +36,9 @@ def forward(self, x):
 from .eva_clip_model import EVA2CLIPModel
 import argparse
 from copy import deepcopy
-def override_dist_dtype_device_args(args, b={}):
+def override_dist_dtype_device_args(args, b=None):
+    if b is None:
+        b = {}
     if args.mode == 'inference':
         minimal_args = argparse.Namespace(
             world_size=args.world_size,
diff --git a/utils/models/cogvlm_model.py b/utils/models/cogvlm_model.py
index 30600eb4..2f109111 100644
--- a/utils/models/cogvlm_model.py
+++ b/utils/models/cogvlm_model.py
@@ -35,7 +35,9 @@ def forward(self, x):
 from .eva_clip_model import EVA2CLIPModel
 import argparse
 from copy import deepcopy
-def override_dist_dtype_device_args(args, b={}):
+def override_dist_dtype_device_args(args, b=None):
+    if b is None:
+        b = {}
     if args.mode == 'inference':
         minimal_args = argparse.Namespace(
             world_size=args.world_size,