diff --git a/vllm_omni/entrypoints/omni_stage.py b/vllm_omni/entrypoints/omni_stage.py
index 4755b2384b2..e1a3c5cf43a 100644
--- a/vllm_omni/entrypoints/omni_stage.py
+++ b/vllm_omni/entrypoints/omni_stage.py
@@ -698,6 +698,12 @@ def _stage_worker(
             in_q = create_zmq_queue(zmq_ctx, in_q, zmq.PULL)
         if isinstance(out_q, str):
             out_q = create_zmq_queue(zmq_ctx, out_q, zmq.PUSH)
+        # When using ZMQ (cross-node IPC), disable SHM so data is sent inline.
+        shm_threshold_bytes = sys.maxsize
+        logger.info(
+            "[Stage-%s] ZMQ transport detected; disabling SHM IPC (shm_threshold_bytes set to maxsize)",
+            stage_id,
+        )
 
     # Aggregates for running average
     _agg_total_tokens = 0
@@ -1092,6 +1098,12 @@ async def _stage_worker_async(
             in_q = create_zmq_queue(zmq_ctx, in_q, zmq.PULL)
         if isinstance(out_q, str):
             out_q = create_zmq_queue(zmq_ctx, out_q, zmq.PUSH)
+        # When using ZMQ (cross-node IPC), disable SHM so data is sent inline.
+        shm_threshold_bytes = sys.maxsize
+        logger.info(
+            "[Stage-%s] ZMQ transport detected; disabling SHM IPC (shm_threshold_bytes set to maxsize)",
+            stage_id,
+        )
 
     # Aggregates for running average
     _agg_total_tokens = 0