diff --git a/src/backend/access/heap/visibilitymap.c b/src/backend/access/heap/visibilitymap.c
index 11e6d0d479..114d1b42b3 100644
--- a/src/backend/access/heap/visibilitymap.c
+++ b/src/backend/access/heap/visibilitymap.c
@@ -622,11 +622,9 @@ static void
 vm_extend(Relation rel, BlockNumber vm_nblocks)
 {
 	BlockNumber vm_nblocks_now;
-	PGAlignedBlock pg;
+	PGAlignedBlock pg = {0};
 	SMgrRelation reln;
 
-	PageInit((Page) pg.data, BLCKSZ, 0);
-
 	/*
 	 * We use the relation extension lock to lock out other backends trying to
 	 * extend the visibility map at the same time. It also locks out extension
@@ -662,8 +660,6 @@ vm_extend(Relation rel, BlockNumber vm_nblocks)
 	/* Now extend the file */
 	while (vm_nblocks_now < vm_nblocks)
 	{
-		PageSetChecksumInplace((Page) pg.data, vm_nblocks_now);
-
 		smgrextend(reln, VISIBILITYMAP_FORKNUM, vm_nblocks_now, pg.data, false);
 		vm_nblocks_now++;
 	}
diff --git a/src/backend/storage/freespace/freespace.c b/src/backend/storage/freespace/freespace.c
index 3e9693b293..90c529958e 100644
--- a/src/backend/storage/freespace/freespace.c
+++ b/src/backend/storage/freespace/freespace.c
@@ -608,10 +608,9 @@ static void
 fsm_extend(Relation rel, BlockNumber fsm_nblocks)
 {
 	BlockNumber fsm_nblocks_now;
-	PGAlignedBlock pg;
+	PGAlignedBlock pg = {0};
 	SMgrRelation reln;
 
-	PageInit((Page) pg.data, BLCKSZ, 0);
 
 	/*
 	 * We use the relation extension lock to lock out other backends trying to
@@ -649,8 +648,6 @@ fsm_extend(Relation rel, BlockNumber fsm_nblocks)
 	/* Extend as needed. */
 	while (fsm_nblocks_now < fsm_nblocks)
 	{
-		PageSetChecksumInplace((Page) pg.data, fsm_nblocks_now);
-
 		smgrextend(reln, FSM_FORKNUM, fsm_nblocks_now,
 				   pg.data, false);
 		fsm_nblocks_now++;