diff --git a/check_rpi_temperature.sh b/check_rpi_temperature.sh
index 149ee03..66b6ae7 100755
--- a/check_rpi_temperature.sh
+++ b/check_rpi_temperature.sh
@@ -4,7 +4,8 @@
 
 echoerr() { echo "$@" 1>&2; }
 
-if ! $(command -v bc); then
+pathToBc=$(command -v bc)
+if [ $? -ne 0 ]; then
 	echoerr Please install bc
 	exit -2
 fi