diff --git a/Dell_iDRAC_fan_controller.sh b/Dell_iDRAC_fan_controller.sh
index 145eebd..7bf6f37 100644
--- a/Dell_iDRAC_fan_controller.sh
+++ b/Dell_iDRAC_fan_controller.sh
@@ -15,11 +15,11 @@ trap 'graceful_exit' SIGINT SIGQUIT SIGTERM
 
 # Check if FAN_SPEED variable is in hexadecimal format. If not, convert it to hexadecimal
 if [[ $FAN_SPEED == 0x* ]]; then
-  readonly DECIMAL_FAN_SPEED=$(printf '%d' $FAN_SPEED)
+  readonly DECIMAL_FAN_SPEED=$(convert_hexadecimal_value_to_decimal "$FAN_SPEED")
   readonly HEXADECIMAL_FAN_SPEED=$FAN_SPEED
 else
   readonly DECIMAL_FAN_SPEED=$FAN_SPEED
-  readonly HEXADECIMAL_FAN_SPEED=$(convert_decimal_value_to_hexadecimal $FAN_SPEED)
+  readonly HEXADECIMAL_FAN_SPEED=$(convert_decimal_value_to_hexadecimal "$FAN_SPEED")
 fi
 
 # Check if the iDRAC host is set to 'local' or not then set the IDRAC_LOGIN_STRING accordingly
diff --git a/functions.sh b/functions.sh
index 2e4c947..094d13d 100644
--- a/functions.sh
+++ b/functions.sh
@@ -23,6 +23,15 @@ function convert_decimal_value_to_hexadecimal() {
   echo $HEXADECIMAL_NUMBER
 }
 
+# Convert first parameter given ($HEXADECIMAL_NUMBER) to decimal
+# Usage : convert_hexadecimal_value_to_decimal "$HEXADECIMAL_NUMBER"
+# Returns : decimal value of HEXADECIMAL_NUMBER
+function convert_hexadecimal_value_to_decimal() {
+  local HEXADECIMAL_NUMBER=$1
+  local DECIMAL_NUMBER=$(printf '%d' $HEXADECIMAL_NUMBER)
+  echo $DECIMAL_NUMBER
+}
+
 # Retrieve temperature sensors data using ipmitool
 # Usage : retrieve_temperatures $IS_EXHAUST_TEMPERATURE_SENSOR_PRESENT $IS_CPU2_TEMPERATURE_SENSOR_PRESENT
 function retrieve_temperatures() {