diff --git a/include/mpc83xx.h b/include/mpc83xx.h
index ea137c7..8292018 100644
--- a/include/mpc83xx.h
+++ b/include/mpc83xx.h
@@ -1000,6 +1000,7 @@
 #define SDRAM_CFG_8_BE			0x00040000
 #define SDRAM_CFG_NCAP			0x00020000
 #define SDRAM_CFG_2T_EN			0x00008000
+#define SDRAM_CFG_HSE			0x00000008
 #define SDRAM_CFG_BI			0x00000001
 
 /* DDR_SDRAM_MODE - DDR SDRAM Mode Register