diff --git a/src/backend/access/transam/xlogreader.c b/src/backend/access/transam/xlogreader.c
index 35029cf97d..612b1b3723 100644
--- a/src/backend/access/transam/xlogreader.c
+++ b/src/backend/access/transam/xlogreader.c
@@ -738,7 +738,7 @@ ValidXLogRecordHeader(XLogReaderState *state, XLogRecPtr RecPtr,
                              (uint32) SizeOfXLogRecord, record->xl_tot_len);
        return false;
    }
-   if (record->xl_rmid > RM_MAX_ID)
+   if (record->xl_rmid > RM_MAX_ID && record->xl_rmid < RM_CUSTOM_MIN_ID)
    {