diff --git a/vllm/distributed/device_communicators/shm_broadcast.py b/vllm/distributed/device_communicators/shm_broadcast.py
index 842d9edfd1c55..0d54fc73c882b 100644
--- a/vllm/distributed/device_communicators/shm_broadcast.py
+++ b/vllm/distributed/device_communicators/shm_broadcast.py
@@ -357,8 +357,11 @@ class MessageQueue:
                     # if we wait for a long time, log a message
                     if (time.monotonic() - start_time
                             > VLLM_RINGBUFFER_WARNING_INTERVAL * n_warning):
-                        logger.debug("No available block found in %s second. ",
-                                     VLLM_RINGBUFFER_WARNING_INTERVAL)
+                        logger.debug(
+                            ("No available shared memory broadcast block found"
+                             " in %s second."),
+                            VLLM_RINGBUFFER_WARNING_INTERVAL,
+                        )
                         n_warning += 1
 
                     # if we time out, raise an exception
@@ -415,8 +418,11 @@ class MessageQueue:
                     # if we wait for a long time, log a message
                     if (time.monotonic() - start_time
                             > VLLM_RINGBUFFER_WARNING_INTERVAL * n_warning):
-                        logger.debug("No available block found in %s second. ",
-                                     VLLM_RINGBUFFER_WARNING_INTERVAL)
+                        logger.debug(
+                            ("No available shared memory broadcast block found"
+                             "in %s second."),
+                            VLLM_RINGBUFFER_WARNING_INTERVAL,
+                        )
                         n_warning += 1
 
                     # if we time out, raise an exception