diff --git a/src/backend/replication/slot.c b/src/backend/replication/slot.c
index 251b549768d..11b44a483c7 100644
--- a/src/backend/replication/slot.c
+++ b/src/backend/replication/slot.c
@@ -984,7 +984,7 @@ CreateSlotOnDisk(ReplicationSlot *slot)
 	/*
 	 * If we'd now fail - really unlikely - we wouldn't know whether this slot
 	 * would persist after an OS crash or not - so, force a restart. The
-	 * restart would try to fysnc this again till it works.
+	 * restart would try to fsync this again till it works.
 	 */
 	START_CRIT_SECTION();