diff --git a/arch/nios2/lib/board.c b/arch/nios2/lib/board.c
index f83e691..f6c6bc1 100644
--- a/arch/nios2/lib/board.c
+++ b/arch/nios2/lib/board.c
@@ -95,7 +95,7 @@
 	/* compiler optimization barrier needed for GCC >= 3.4 */
 	__asm__ __volatile__("": : :"memory");
 
-	memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE );
+	memset( gd, 0, GENERATED_GBL_DATA_SIZE );
 
 	gd->bd = (bd_t *)(gd+1);	/* At end of global data */
 	gd->baudrate = CONFIG_BAUDRATE;