diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h
index 95d01b97444..b83e0beac76 100644
--- a/src/include/access/xlog.h
+++ b/src/include/access/xlog.h
@@ -309,7 +309,6 @@ extern XLogRecPtr GetRedoRecPtr(void);
 extern XLogRecPtr GetInsertRecPtr(void);
 extern XLogRecPtr GetFlushRecPtr(void);
 extern void GetNextXidAndEpoch(TransactionId *xid, uint32 *epoch);
-extern TimeLineID GetRecoveryTargetTLI(void);
 
 extern bool CheckPromoteSignal(void);
 extern void WakeupRecovery(void);