diff --git a/python/sglang/srt/server_args.py b/python/sglang/srt/server_args.py
index 678274a4c..130c0bbe7 100644
--- a/python/sglang/srt/server_args.py
+++ b/python/sglang/srt/server_args.py
@@ -4453,7 +4453,7 @@ class ServerArgs:
             default=ServerArgs.nsa_prefill_cp_mode,
             choices=NSA_PREFILL_CP_SPLIT_CHOICES,
             help="Token splitting mode for the prefill phase of DeepSeek v3.2 under context parallelism. Optional values: 'in-seq-split' (default), 'round-robin-split'. "
-            "'round-robin-split' distributes tokens across ranks based on token_idx % cp_size. It supports multi-batch prefill, fused MoE, and FP8 KV cache.",
+            "'round-robin-split' distributes tokens across ranks based on token_idx %% cp_size. It supports multi-batch prefill, fused MoE, and FP8 KV cache.",
         )
         parser.add_argument(
             "--enable-fused-qk-norm-rope",