diff -ur indi-apogee-1.0/indialta.c indi-apogee-1.0.format/indialta.c
--- indi-apogee-1.0/indialta.c	2008-11-18 10:43:03.000000000 +0100
+++ indi-apogee-1.0.format/indialta.c	2014-01-09 17:39:36.021682769 +0100
@@ -314,7 +314,7 @@
 				IUResetSwitch (&FanSpeedSP);
 				FanSpeedSP.sp[fs].s = ISS_ON;
 				FanSpeedSP.s = IPS_OK;
-				IDSetSwitch (&FanSpeedSP, smsg);
+				IDSetSwitch (&FanSpeedSP, "%s", smsg);
 		    	}
 
 		    break;
@@ -854,7 +854,7 @@
 	}
 
 	TemperatureRNP.np[0].value = cnow;
-	IDSetNumber (&TemperatureRNP, msg);
+	IDSetNumber (&TemperatureRNP, "%s", msg);
 
 	lasts = status;