diff --git a/core/dev/sht11-sensor.c b/core/dev/sht11-sensor.c
index f9834a1c2..fa0738cb2 100644
--- a/core/dev/sht11-sensor.c
+++ b/core/dev/sht11-sensor.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * @(#)$Id: sht11-sensor.c,v 1.1 2010/01/14 20:16:33 adamdunkels Exp $
+ * @(#)$Id: sht11-sensor.c,v 1.2 2010/01/15 08:51:21 adamdunkels Exp $
  */
 
 #include <stdlib.h>
@@ -59,7 +59,10 @@ value(int type)
     /* Total Solar Radiation. */
   case SHT11_SENSOR_HUMIDITY:
     return sht11_humidity();
-  }
+
+  case SHT11_SENSOR_BATTERY_INDICATOR:
+    return sht11_sreg() & 0x40? 1: 0;
+}
   return 0;
 }
 /*---------------------------------------------------------------------------*/
@@ -76,7 +79,7 @@ status(int type)
 
 /*---------------------------------------------------------------------------*/
 static int
-configure(int type, void *c)
+configure(int type, int c)
 {
   switch(type) {
   case SENSORS_ACTIVE:
diff --git a/core/dev/sht11-sensor.h b/core/dev/sht11-sensor.h
index f09e7908e..6618a3877 100644
--- a/core/dev/sht11-sensor.h
+++ b/core/dev/sht11-sensor.h
@@ -27,14 +27,14 @@
  * SUCH DAMAGE.
  *
  *
- * $Id: sht11-sensor.h,v 1.1 2010/01/14 20:16:33 adamdunkels Exp $
+ * $Id: sht11-sensor.h,v 1.2 2010/01/15 08:51:21 adamdunkels Exp $
  *
  * -----------------------------------------------------------------
  *
  * Author  : Adam Dunkels, Joakim Eriksson, Niclas Finne
  * Created : 2010-01-08
- * Updated : $Date: 2010/01/14 20:16:33 $
- *           $Revision: 1.1 $
+ * Updated : $Date: 2010/01/15 08:51:21 $
+ *           $Revision: 1.2 $
  */
 
 #ifndef __SHT11_SENSOR_H__
@@ -44,8 +44,9 @@
 
 extern const struct sensors_sensor sht11_sensor;
 
-#define SHT11_SENSOR_TEMP       0
-#define SHT11_SENSOR_HUMIDITY   1
+#define SHT11_SENSOR_TEMP              0
+#define SHT11_SENSOR_HUMIDITY          1
+#define SHT11_SENSOR_BATTERY_INDICATOR 2
 
 
 #endif /* __SHT11-SENSOR_H__ */