diff --git a/shm/RuleStatShm.h b/shm/RuleStatShm.h
index d1ddb2f..817c582 100644
--- a/shm/RuleStatShm.h
+++ b/shm/RuleStatShm.h
@@ -53,7 +53,7 @@ struct ShmSpinLock {
         continue;
       }
       // 持有者存活，短暂退避
-      struct timespec ts = {0, 100000}; // 100µs
+      struct timespec ts = {0, 100000}; // 100us
       ::nanosleep(&ts, nullptr);
     }
   }