diff --git a/Libraries/STARTUP/gcc/linker/AIR32F103XB_FLASH.ld b/Libraries/STARTUP/gcc/linker/AIR32F103XB_FLASH.ld
index 4134257..cbc0ea6 100644
--- a/Libraries/STARTUP/gcc/linker/AIR32F103XB_FLASH.ld
+++ b/Libraries/STARTUP/gcc/linker/AIR32F103XB_FLASH.ld
@@ -32,7 +32,7 @@
 ENTRY(Reset_Handler)
 
 /* Highest address of the user mode stack */
-_estack = 0x20004FFF;    /* end of RAM */
+_estack = ORIGIN(RAM) + LENGTH(RAM);    /* end of RAM */
 
 /* Generate a link error if heap and stack don't fit into RAM */
 _Min_Heap_Size = 0x200;      /* required amount of heap  */