diff --git a/src/diffusers/models/autoencoders/autoencoder_kl.py b/src/diffusers/models/autoencoders/autoencoder_kl.py
index 640ee34928..9a4375a36b 100644
--- a/src/diffusers/models/autoencoders/autoencoder_kl.py
+++ b/src/diffusers/models/autoencoders/autoencoder_kl.py
@@ -90,7 +90,7 @@ class AutoencoderKL(ModelMixin, ConfigMixin, FromOriginalModelMixin, PeftAdapter
         shift_factor: Optional[float] = None,
         latents_mean: Optional[Tuple[float]] = None,
         latents_std: Optional[Tuple[float]] = None,
-        force_upcast: float = True,
+        force_upcast: bool = True,
         use_quant_conv: bool = True,
         use_post_quant_conv: bool = True,
         mid_block_add_attention: bool = True,