Just make sure it's rated at least 1/2 a watt to be safe.
The wattage rating is usually on the resistor package.
If you don't know, ask the sales guy to verify the wattage rating is half a watt on thr resistor.
Here's the technical formula to calculate power draw on a resistor for future reference.
Power(wattage) = (IxI)xR
I = current
VDC=Voltage across resistor