diff --git a/src/config/linuxbios_ram.ld b/src/config/linuxbios_ram.ld
index a159ce035e..5d84bddac5 100644
--- a/src/config/linuxbios_ram.ld
+++ b/src/config/linuxbios_ram.ld
@@ -93,7 +93,7 @@ SECTIONS
 	.stack . : {
 		/* Reserve a stack for each possible cpu */
 		/* the stack for ap will be put after pgtbl in 1M to CONFIG_LB_MEM_TOPK range when VGA and ROM_RUN and CONFIG_LB_MEM_TOPK>1024*/
-		. = ((CONFIG_CONSOLE_VGA || CONFIG_PCI_ROM_RUN)&&(_RAMBASE<0x100000)&&((CONFIG_LB_MEM_TOPK<<10)>0x100000) ) ? STACK_SIZE : (CONFIG_MAX_CPUS*STACK_SIZE);
+		. = ((CONFIG_CONSOLE_VGA || CONFIG_PCI_ROM_RUN)&&(_RAMBASE<0x100000)&&(CONFIG_LB_MEM_TOPK>(0x100000>>10)) ) ? STACK_SIZE : (CONFIG_MAX_CPUS*STACK_SIZE);
 	}
 	_estack = .;
         _heap = .;
@@ -109,8 +109,10 @@ SECTIONS
 	_ram_seg = _text; 
 	_eram_seg = _eheap;
 
+	_bogus = ASSERT( ((_eram_seg>>10)<CONFIG_LB_MEM_TOPK) , "please increase CONFIG_LB_MEM_TOPK");
+
         _bogus = ASSERT( !((CONFIG_CONSOLE_VGA || CONFIG_PCI_ROM_RUN) && ((_ram_seg<0xa0000) && (_eram_seg>0xa0000))) , "please increase CONFIG_LB_MEM_TOPK and if still fail, try to set _RAMBASE more than 1M");
-	
+
 	/DISCARD/ : {
 		*(.comment)
 		*(.note)