*** a/src/backend/access/gist/gistbuild.c
--- b/src/backend/access/gist/gistbuild.c
***************
*** 668,677 **** gistbufferinginserttuples(GISTBuildState *buildstate, Buffer buffer,
  	if (is_split && BufferGetBlockNumber(buffer) == GIST_ROOT_BLKNO)
  	{
  		GISTBufferingInsertStack *oldroot = gfbb->rootitem;
! 		Page		page = BufferGetPage(buffer);
! 		ItemId		iid;
! 		IndexTuple	idxtuple;
! 		BlockNumber leftmostchild;
  
  		gfbb->rootitem = (GISTBufferingInsertStack *) MemoryContextAlloc(
  							gfbb->context, sizeof(GISTBufferingInsertStack));
--- 668,678 ----
  	if (is_split && BufferGetBlockNumber(buffer) == GIST_ROOT_BLKNO)
  	{
  		GISTBufferingInsertStack *oldroot = gfbb->rootitem;
! 		Page		 page = BufferGetPage(buffer);
! 		ItemId		 iid;
! 		IndexTuple	 idxtuple;
! 		BlockNumber  leftmostchild;
! 		OffsetNumber maxoff, i;
  
  		gfbb->rootitem = (GISTBufferingInsertStack *) MemoryContextAlloc(
  							gfbb->context, sizeof(GISTBufferingInsertStack));
***************
*** 694,699 **** gistbufferinginserttuples(GISTBuildState *buildstate, Buffer buffer,
--- 695,719 ----
  		oldroot->parent = gfbb->rootitem;
  		oldroot->blkno = leftmostchild;
  		oldroot->downlinkoffnum = InvalidOffsetNumber;
+ 		
+ 		/* 
+ 		 * If root page split produce new pages on leven which have buffers
+ 		 * then initialize empty buffers there.
+ 		 */
+ 		if (LEVEL_HAS_BUFFERS(oldroot->level, gfbb))
+ 		{
+ 			maxoff = PageGetMaxOffsetNumber(page);
+ 			for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
+ 			{
+ 				iid = PageGetItemId(page, i);
+ 				idxtuple = (IndexTuple) PageGetItem(page, iid);
+ 				gistGetNodeBuffer(gfbb,
+ 								  buildstate->giststate,
+ 								  ItemPointerGetBlockNumber(&(idxtuple->t_tid)),
+ 								  i,
+ 								  gfbb->rootitem);
+ 			}
+ 		}
  	}
  
  	if (splitinfo)