diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 28f19f1c786..bceef897d6e 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -9680,6 +9680,8 @@ XLogReportParameters(void)
 			XLogFlush(recptr);
 		}
 
+		LWLockAcquire(ControlFileLock, LW_EXCLUSIVE);
+
 		ControlFile->MaxConnections = MaxConnections;
 		ControlFile->max_worker_processes = max_worker_processes;
 		ControlFile->max_prepared_xacts = max_prepared_xacts;
@@ -9688,6 +9690,8 @@ XLogReportParameters(void)
 		ControlFile->wal_log_hints = wal_log_hints;
 		ControlFile->track_commit_timestamp = track_commit_timestamp;
 		UpdateControlFile();
+
+		LWLockRelease(ControlFileLock);
 	}
 }
 
@@ -9912,8 +9916,10 @@ xlog_redo(XLogReaderState *record)
 		}
 
 		/* ControlFile->checkPointCopy always tracks the latest ckpt XID */
+		LWLockAcquire(ControlFileLock, LW_EXCLUSIVE);
 		ControlFile->checkPointCopy.nextXidEpoch = checkPoint.nextXidEpoch;
 		ControlFile->checkPointCopy.nextXid = checkPoint.nextXid;
+		LWLockRelease(ControlFileLock);
 
 		/* Update shared-memory copy of checkpoint XID/epoch */
 		SpinLockAcquire(&XLogCtl->info_lck);
@@ -9971,8 +9977,10 @@ xlog_redo(XLogReaderState *record)
 			SetTransactionIdLimit(checkPoint.oldestXid,
 								  checkPoint.oldestXidDB);
 		/* ControlFile->checkPointCopy always tracks the latest ckpt XID */
+		LWLockAcquire(ControlFileLock, LW_EXCLUSIVE);
 		ControlFile->checkPointCopy.nextXidEpoch = checkPoint.nextXidEpoch;
 		ControlFile->checkPointCopy.nextXid = checkPoint.nextXid;
+		LWLockRelease(ControlFileLock);
 
 		/* Update shared-memory copy of checkpoint XID/epoch */
 		SpinLockAcquire(&XLogCtl->info_lck);