diff --git a/src/backend/storage/lmgr/proc.c b/src/backend/storage/lmgr/proc.c
index 78ad5a29f25..677042962a0 100644
--- a/src/backend/storage/lmgr/proc.c
+++ b/src/backend/storage/lmgr/proc.c
@@ -1093,7 +1093,7 @@ ProcSleep(LOCALLOCK *locallock, LockMethod lockMethodTable)
 				initStringInfo(&logbuf);
 				DescribeLockTag(&locktagbuf, &lock->tag);
 				appendStringInfo(&logbuf,
-					  _("Process %d waits for %s on %s"),
+					  _("Process %d waits for %s on %s."),
 						 MyProcPid,
 						 GetLockmodeName(lock->tag.locktag_lockmethodid,
 										 lockmode),