diff --git a/api/onnx_web/convert/diffusion_original.py b/api/onnx_web/convert/diffusion_original.py
index 602e698e..4fae214b 100644
--- a/api/onnx_web/convert/diffusion_original.py
+++ b/api/onnx_web/convert/diffusion_original.py
@@ -1311,6 +1311,7 @@ def extract_checkpoint(
         if vae_file is None:
             converted_vae_checkpoint = convert_ldm_vae_checkpoint(checkpoint, vae_config)
         else:
+            vae_file = os.path.join(ctx.model_path, vae_file)
             vae_checkpoint = safetensors.torch.load_file(vae_file, device="cpu")
             converted_vae_checkpoint = convert_ldm_vae_checkpoint(vae_checkpoint, vae_config)