diff --git a/python/sglang/multimodal_gen/runtime/distributed/device_communicators/pynccl_wrapper.py b/python/sglang/multimodal_gen/runtime/distributed/device_communicators/pynccl_wrapper.py
index 598e7be9b..671adb549 100644
--- a/python/sglang/multimodal_gen/runtime/distributed/device_communicators/pynccl_wrapper.py
+++ b/python/sglang/multimodal_gen/runtime/distributed/device_communicators/pynccl_wrapper.py
@@ -277,7 +277,7 @@ class NCCLLibrary:
         except Exception as e:
             logger.error(
                 "Failed to load NCCL library from %s ."
-                "It is expected if you are not running on NVIDIA/AMD GPUs."
+                "It is expected if you are not running on NVIDIA/AMD/MTHREADS GPUs."
                 "Otherwise, the nccl library might not exist, be corrupted "
                 "or it does not support the current platform %s."
                 "If you already have the library, please set the "
diff --git a/python/sglang/multimodal_gen/runtime/models/encoders/clip.py b/python/sglang/multimodal_gen/runtime/models/encoders/clip.py
index 5133759cb..deac46cf0 100644
--- a/python/sglang/multimodal_gen/runtime/models/encoders/clip.py
+++ b/python/sglang/multimodal_gen/runtime/models/encoders/clip.py
@@ -230,10 +230,12 @@ class CLIPAttention(nn.Module):
             key_states = key_states.transpose(1, 2)
             value_states = value_states.transpose(1, 2)
 
-            if current_platform.is_rocm():
+            if current_platform.is_rocm() or current_platform.is_musa():
                 # ROCm: Using both is_causal=True and attn_mask causes NaN.
                 # Use is_causal=True alone (padding mask not needed for CLIP
                 # since pooler_output comes from EOS token before padding).
+                # XXX (MUSA): Torch SDPA on MUSA currently does not support
+                # using both `attn_mask` and `is_causal=True` simultaneously.
                 attn_output = torch.nn.functional.scaled_dot_product_attention(
                     query_states,
                     key_states,
diff --git a/python/sglang/multimodal_gen/utils.py b/python/sglang/multimodal_gen/utils.py
index 10c5841c8..87bdf6341 100644
--- a/python/sglang/multimodal_gen/utils.py
+++ b/python/sglang/multimodal_gen/utils.py
@@ -52,8 +52,8 @@ def find_nccl_library() -> str:
     """
     We either use the library file specified by the `VLLM_NCCL_SO_PATH`
     environment variable, or we find the library file brought by PyTorch.
-    After importing `torch`, `libnccl.so.2` or `librccl.so.1` can be
-    found by `ctypes` automatically.
+    After importing `torch`, `libnccl.so.2`, `librccl.so.1` or `libmccl.so.2`
+    can be found by `ctypes` automatically.
     """
     so_file = envs.SGLANG_DIFFUSION_NCCL_SO_PATH
 
@@ -68,8 +68,10 @@ def find_nccl_library() -> str:
             so_file = "libnccl.so.2"
         elif torch.version.hip is not None:
             so_file = "librccl.so.1"
+        elif hasattr(torch.version, "musa") and torch.version.musa is not None:
+            so_file = "libmccl.so.2"
         else:
-            raise ValueError("NCCL only supports CUDA and ROCm backends.")
+            raise ValueError("NCCL only supports CUDA, ROCm and MUSA backends.")
         logger.info("Found nccl from library %s", so_file)
     return str(so_file)