--- a/coolers/sensors.h	Mon May 05 23:33:31 2014 +0200
+++ b/coolers/sensors.h	Tue May 06 13:24:25 2014 +0200
@@ -1,6 +1,10 @@
 #ifndef	MY_SENSORS_H
 #define MY_SENSORS_H
 
-void my_sensors_loop(void);
+#ifdef HAVE_WIRINGPI_H
+
+PI_THREAD (my_sensors_loop);
 
 #endif
+
+#endif