diff --git a/RFM69.cpp b/RFM69.cpp
index 9b35371..e34a602 100644
--- a/RFM69.cpp
+++ b/RFM69.cpp
@@ -474,7 +474,7 @@ byte RFM69::readTemperature(byte calFactor)  //returns centigrade
 {
   setMode(RF69_MODE_STANDBY);
   writeReg(REG_TEMP1, RF_TEMP1_MEAS_START);
-  while ((readReg(REG_TEMP1) & RF_TEMP1_MEAS_RUNNING)) Serial.print('*');
+  while ((readReg(REG_TEMP1) & RF_TEMP1_MEAS_RUNNING));
   return ~readReg(REG_TEMP2) + COURSE_TEMP_COEF + calFactor; //'complement'corrects the slope, rising temp = rising val
 }												   	  // COURSE_TEMP_COEF puts reading in the ballpark, user can add additional correction
 
@@ -482,4 +482,4 @@ void RFM69::rcCalibration()
 {
   writeReg(REG_OSC1, RF_OSC1_RCCAL_START);
   while ((readReg(REG_OSC1) & RF_OSC1_RCCAL_DONE) == 0x00);
-}
\ No newline at end of file
+}