diff --git a/docker/Dockerfile.rocm b/docker/Dockerfile.rocm
index 7df5e5fcf..c965d140f 100644
--- a/docker/Dockerfile.rocm
+++ b/docker/Dockerfile.rocm
@@ -33,6 +33,7 @@ RUN python -m pip cache purge
 # Performance environment variable.
 
 ENV HIP_FORCE_DEV_KERNARG=1
+ENV SGLANG_SET_CPU_AFFINITY=1
 ENV SGLANG_ALLOW_OVERWRITE_LONGER_CONTEXT_LEN=1
 ENV NCCL_MIN_NCHANNELS=112