diff --git a/miles/backends/sglang_diffusion_utils/sglang_diffusion_engine.py b/miles/backends/sglang_diffusion_utils/sglang_diffusion_engine.py
index 3de4dd1a..1f22bdc6 100644
--- a/miles/backends/sglang_diffusion_utils/sglang_diffusion_engine.py
+++ b/miles/backends/sglang_diffusion_utils/sglang_diffusion_engine.py
@@ -340,7 +340,7 @@ def _compute_server_args(args, host, port, nccl_port):
     # dit_precision / vae_precision are PipelineConfig fields, not ServerArgs, so forward them explicitly (only when changed from the class default, to avoid clobbering a subclass override).
     from sglang.multimodal_gen.configs.pipeline_configs.base import PipelineConfig
 
-    for field_name in ("dit_precision", "vae_precision"):
+    for field_name in ("dit_precision", "vae_precision", "text_encoder_precisions"):
         val = getattr(args, f"sglang_{field_name}", None)
         if val is not None and val != getattr(PipelineConfig, field_name, None):
             kwargs[field_name] = val
diff --git a/miles/utils/arguments.py b/miles/utils/arguments.py
index 18ba848a..18d62be2 100644
--- a/miles/utils/arguments.py
+++ b/miles/utils/arguments.py
@@ -1421,6 +1421,7 @@ def add_sglang_tp_size():
         )
 
         parser.set_defaults(sglang_tensor_parallel_size=add_sglang_tp_size())
+        parser.set_defaults(sglang_text_encoder_precisions=None)
         return parser
 
     return add_miles_arguments