diff --git a/src/backend/utils/time/snapmgr.c b/src/backend/utils/time/snapmgr.c
index a2cb4a037f..f4bdabfd79 100644
--- a/src/backend/utils/time/snapmgr.c
+++ b/src/backend/utils/time/snapmgr.c
@@ -1480,7 +1480,6 @@ SerializeSnapshot(Snapshot snapshot, char *start_address)
 {
 	SerializedSnapshotData *serialized_snapshot;
 
-	Assert(snapshot->xcnt >= 0);
 	Assert(snapshot->subxcnt >= 0);
 
 	serialized_snapshot = (SerializedSnapshotData *) start_address;