diff --git a/src/backend/storage/smgr/md.c b/src/backend/storage/smgr/md.c
index d6234f3..862ff12 100644
--- a/src/backend/storage/smgr/md.c
+++ b/src/backend/storage/smgr/md.c
@@ -810,6 +810,8 @@ int he3db_mdread_pagexlog(SMgrRelation reln, ForkNumber forknum, BlockNumber blo
 						(errcode_for_file_access(),
 						 errmsg("could not read block %u in file \"%s\": %m",
 								blocknum, FilePathName(v->mdfd_vfd))));
+			if (he3mirror && nbytes == 0)
+				MemSet(*buffer, 0, BLCKSZ);
 
 			ereport(PANIC,
 					(errcode(ERRCODE_DATA_CORRUPTED),