diff --git a/plugins/rpi/rpi_temp b/plugins/rpi/rpi_temp
index 9f38b802..8eff2283 100755
--- a/plugins/rpi/rpi_temp
+++ b/plugins/rpi/rpi_temp
@@ -28,6 +28,6 @@ fi
 # values
 TEMP_MILLI_C=$(cat /sys/class/thermal/thermal_zone0/temp)
 
-echo thermal_zone0.value $( echo "$TEMP_MILLI_C / 1000" | bc )
+echo thermal_zone0.value $( echo "scale=3; $TEMP_MILLI_C / 1000" | bc )
 
 exit 0