diff --git a/python/sglang/srt/managers/scheduler.py b/python/sglang/srt/managers/scheduler.py
index 7f47a522e..663d4c4f9 100644
--- a/python/sglang/srt/managers/scheduler.py
+++ b/python/sglang/srt/managers/scheduler.py
@@ -1409,9 +1409,9 @@ def run_scheduler_process(
     if get_bool_env_var("SGLANG_SET_CPU_AFFINITY"):
         set_gpu_proc_affinity(server_args.tp_size, server_args.nnodes, gpu_id)
 
-    # [For Router] if env var "DP_RANK" exist, set dp_rank to the value of the env var
-    if dp_rank is None and "DP_RANK" in os.environ:
-        dp_rank = int(os.environ["DP_RANK"])
+    # [For Router] if env var "SGLANG_DP_RANK" exist, set dp_rank to the value of the env var
+    if dp_rank is None and "SGLANG_DP_RANK" in os.environ:
+        dp_rank = int(os.environ["SGLANG_DP_RANK"])
 
     if dp_rank is None:
         configure_logger(server_args, prefix=f" TP{tp_rank}")
diff --git a/rust/py_src/sglang_router/launch_server.py b/rust/py_src/sglang_router/launch_server.py
index 25bd0ffd6..ec86e8b2a 100644
--- a/rust/py_src/sglang_router/launch_server.py
+++ b/rust/py_src/sglang_router/launch_server.py
@@ -38,8 +38,8 @@ def setup_logger():
 def run_server(server_args, dp_rank):
     os.setpgrp()  # Create new process group
 
-    # Set DP_RANK environment variable
-    os.environ["DP_RANK"] = str(dp_rank)
+    # Set SGLANG_DP_RANK environment variable
+    os.environ["SGLANG_DP_RANK"] = str(dp_rank)
 
     launch_server(server_args)