diff --git a/src/diffusers/models/controlnet_sd3.py b/src/diffusers/models/controlnet_sd3.py
index 629cb661eda5..86a6a9178514 100644
--- a/src/diffusers/models/controlnet_sd3.py
+++ b/src/diffusers/models/controlnet_sd3.py
@@ -239,16 +239,16 @@ def _set_gradient_checkpointing(self, module, value=False):
             module.gradient_checkpointing = value
 
     @classmethod
-    def from_transformer(cls, transformer, num_layers=None, load_weights_from_transformer=True):
+    def from_transformer(cls, transformer, num_layers=12, load_weights_from_transformer=True):
         config = transformer.config
         config["num_layers"] = num_layers or config.num_layers
         controlnet = cls(**config)
 
         if load_weights_from_transformer:
-            controlnet.pos_embed.load_state_dict(transformer.pos_embed.state_dict(), strict=False)
-            controlnet.time_text_embed.load_state_dict(transformer.time_text_embed.state_dict(), strict=False)
-            controlnet.context_embedder.load_state_dict(transformer.context_embedder.state_dict(), strict=False)
-            controlnet.transformer_blocks.load_state_dict(transformer.transformer_blocks.state_dict())
+            controlnet.pos_embed.load_state_dict(transformer.pos_embed.state_dict())
+            controlnet.time_text_embed.load_state_dict(transformer.time_text_embed.state_dict())
+            controlnet.context_embedder.load_state_dict(transformer.context_embedder.state_dict())
+            controlnet.transformer_blocks.load_state_dict(transformer.transformer_blocks.state_dict(), strict=False)
 
             controlnet.pos_embed_input = zero_module(controlnet.pos_embed_input)