diff --git a/logd/LogKlog.cpp b/logd/LogKlog.cpp
index d23254d..a7e7208 100644
--- a/logd/LogKlog.cpp
+++ b/logd/LogKlog.cpp
@@ -579,7 +579,7 @@
     const pid_t tid = pid;
     uid_t uid = AID_ROOT;
     if (pid) {
-        logbuf->lock();
+        logbuf->wrlock();
         uid = logbuf->pidToUid(pid);
         logbuf->unlock();
     }