diff --git a/comfy/sd.py b/comfy/sd.py
index 0ff918cb..097fbb20 100644
--- a/comfy/sd.py
+++ b/comfy/sd.py
@@ -302,12 +302,14 @@ class ModelPatcher:
             t = model_sd[k]
             size += t.nelement() * t.element_size()
         self.size = size
+        self.model_keys = set(model_sd.keys())
         return size
 
     def clone(self):
         n = ModelPatcher(self.model, self.size)
         n.patches = self.patches[:]
         n.model_options = copy.deepcopy(self.model_options)
+        n.model_keys = self.model_keys
         return n
 
     def set_model_tomesd(self, ratio):
@@ -349,9 +351,8 @@ class ModelPatcher:
 
     def add_patches(self, patches, strength_patch=1.0, strength_model=1.0):
         p = {}
-        model_sd = self.model.state_dict()
         for k in patches:
-            if k in model_sd:
+            if k in self.model_keys:
                 p[k] = patches[k]
         self.patches += [(strength_patch, p, strength_model)]
         return p.keys()
@@ -365,7 +366,7 @@ class ModelPatcher:
         return sd
 
     def patch_model(self):
-        model_sd = self.model.state_dict()
+        model_sd = self.model_state_dict()
         for p in self.patches:
             for k in p[1]:
                 v = p[1][k]