diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index c80b14ed97..4452d7566a 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -12095,7 +12095,8 @@ WaitForWALToBecomeAvailable(XLogRecPtr RecPtr, bool randAccess,
 
 					/*
 					 * Wait for more WAL to arrive. Time out after 5 seconds
-					 * to react to a trigger file promptly.
+					 * to react to a trigger file promptly and to check if
+					 * the WAL receiver is still active.
 					 */
 					(void) WaitLatch(&XLogCtl->recoveryWakeupLatch,
 									 WL_LATCH_SET | WL_TIMEOUT |