diff --git a/dtt/ds1775.c b/dtt/ds1775.c
index e44cee3279..0fbb0b42a7 100644
--- a/dtt/ds1775.c
+++ b/dtt/ds1775.c
@@ -25,7 +25,7 @@
 #include <i2c.h>
 #include <dtt.h>
 
-#define DTT_I2C_DEV_CODE 0x49		/* Dallas Semi's DS1775 device code */
+#define DTT_I2C_DEV_CODE	CFG_I2C_DTT_ADDR /* Dallas Semi's DS1775 device code */
 
 int dtt_read(int sensor, int reg)
 {
diff --git a/include/configs/taihu.h b/include/configs/taihu.h
index d623e56009..6d204a9b57 100644
--- a/include/configs/taihu.h
+++ b/include/configs/taihu.h
@@ -244,6 +244,7 @@ unsigned char spi_read(void);
 /* standard dtt sensor configuration */
 #define CONFIG_DTT_DS1775	1
 #define CONFIG_DTT_SENSORS	{ 0 }
+#define CFG_I2C_DTT_ADDR	0x49
 
 /*-----------------------------------------------------------------------
  * PCI stuff