diff --git a/src/lsm303/lsm303.h b/src/lsm303/lsm303.h
index 8cbc9b37..767d547f 100644
--- a/src/lsm303/lsm303.h
+++ b/src/lsm303/lsm303.h
@@ -33,8 +33,8 @@
 namespace upm {
 
 /* LSM303 Address definitions */
-#define LSM303_MAG 0x1E // assuming SA0 grounded
-#define LSM303_ACC 0x18 // assuming SA0 grounded
+#define LSM303_MAG 0x1E
+#define LSM303_ACC 0x19
 
 /* LSM303 Register definitions */
 #define CTRL_REG1_A 0x20