diff --git a/comfy_extras/nodes_freelunch.py b/comfy_extras/nodes_freelunch.py
index 535eece3..c3542a7a 100644
--- a/comfy_extras/nodes_freelunch.py
+++ b/comfy_extras/nodes_freelunch.py
@@ -37,13 +37,13 @@ class FreeU:
     CATEGORY = "_for_testing"
 
     def patch(self, model, b1, b2, s1, s2):
+        model_channels = model.model.model_config.unet_config["model_channels"]
+        scale_dict = {model_channels * 4: (b1, s1), model_channels * 2: (b2, s2)}
         def output_block_patch(h, hsp, transformer_options):
-            if h.shape[1] == 1280:
-                h[:,:640] = h[:,:640] * b1
-                hsp = Fourier_filter(hsp, threshold=1, scale=s1)
-            if h.shape[1] == 640:
-                h[:,:320] = h[:,:320] * b2
-                hsp = Fourier_filter(hsp, threshold=1, scale=s2)
+            scale = scale_dict.get(h.shape[1], None)
+            if scale is not None:
+                h[:,:h.shape[1] // 2] = h[:,:h.shape[1] // 2] * scale[0]
+                hsp = Fourier_filter(hsp, threshold=1, scale=scale[1])
             return h, hsp
 
         m = model.clone()