diff --git a/backend/state_dict.py b/backend/state_dict.py
index 4bb6c8d8..02634b6d 100644
--- a/backend/state_dict.py
+++ b/backend/state_dict.py
@@ -13,6 +13,17 @@ class StateDictItem:
         return StateDictItem(self.key, t, advanced_indexing=advanced_indexing)
 
 
+def split_state_dict_with_prefix(sd, prefix):
+    vae_sd = {}
+
+    for k, v in list(sd.items()):
+        if k.startswith(prefix):
+            vae_sd[k] = StateDictItem(k[len(prefix):], v)
+            del sd[k]
+
+    return vae_sd
+
+
 def shrink_last_key(t):
     ts = t.split('.')
     del ts[-1]
diff --git a/backend/vae/loader.py b/backend/vae/loader.py
index 035626a0..6d858154 100644
--- a/backend/vae/loader.py
+++ b/backend/vae/loader.py
@@ -1,30 +1,18 @@
 from diffusers import AutoencoderKL
 from backend.vae.configs.guess import guess_vae_config
-from backend.state_dict import StateDictItem, compile_state_dict
+from backend.state_dict import split_state_dict_with_prefix, compile_state_dict
 from backend.operations import using_forge_operations
 from backend.attention import AttentionProcessorForge
 from diffusers.loaders.single_file_model import convert_ldm_vae_checkpoint
 
 
-def convert_vae_state_dict(sd):
-    vae_sd = {}
-    prefix = "first_stage_model."
-
-    for k, v in list(sd.items()):
-        if k.startswith(prefix):
-            vae_sd[k] = StateDictItem(k[len(prefix):], v)
-            del sd[k]
-
-    return vae_sd
-
-
 def load_vae_from_state_dict(state_dict):
     config = guess_vae_config(state_dict)
 
     with using_forge_operations():
         model = AutoencoderKL(**config)
 
-    vae_state_dict = convert_vae_state_dict(state_dict)
+    vae_state_dict = split_state_dict_with_prefix(state_dict, "first_stage_model.")
     vae_state_dict = convert_ldm_vae_checkpoint(vae_state_dict, config)
     vae_state_dict, mapping = compile_state_dict(vae_state_dict)
     model.load_state_dict(vae_state_dict, strict=True)