diff --git a/comfy/model_detection.py b/comfy/model_detection.py
index 51d2035e4..5443f90f5 100644
--- a/comfy/model_detection.py
+++ b/comfy/model_detection.py
@@ -584,7 +584,7 @@ def convert_diffusers_mmdit(state_dict, output_prefix=""):
         num_joint = count_blocks(state_dict, 'joint_transformer_blocks.{}.')
         num_single = count_blocks(state_dict, 'single_transformer_blocks.{}.')
         sd_map = comfy.utils.auraflow_to_diffusers({"n_double_layers": num_joint, "n_layers": num_joint + num_single}, output_prefix=output_prefix)
-    elif 'adaln_single.emb.timestep_embedder.linear_2.weight' in state_dict: # PixArt
+    elif 'adaln_single.emb.timestep_embedder.linear_1.bias' in state_dict and 'pos_embed.proj.bias' in state_dict: # PixArt
         num_blocks = count_blocks(state_dict, 'transformer_blocks.{}.')
         sd_map = comfy.utils.pixart_to_diffusers({"depth": num_blocks}, output_prefix=output_prefix)
     elif 'x_embedder.weight' in state_dict: #Flux