diff --git a/comfy/model_management.py b/comfy/model_management.py
index bcc93779223..edbe6a8a4bb 100644
--- a/comfy/model_management.py
+++ b/comfy/model_management.py
@@ -668,6 +668,7 @@ def unet_manual_cast(weight_dtype, inference_device, supported_dtypes=[torch.flo
     if bf16_supported and weight_dtype == torch.bfloat16:
         return None
 
+    fp16_supported = should_use_fp16(inference_device, prioritize_performance=True)
     for dt in supported_dtypes:
         if dt == torch.float16 and fp16_supported:
             return torch.float16