diff --git a/install b/install
index d5eea32..d2899f3 100755
--- a/install
+++ b/install
@@ -185,6 +185,7 @@ fi
 if grep -rq raspberrypi.org /etc/apt/*; then
   rpivers="$(awk '$1 == "Revision" { print $3 }' /proc/cpuinfo)"
   echo "RPi revision code :: ${rpivers}"
+  # https://elinux.org/RPi_HardwareHistory
   if [[ "${rpivers:0:1}" =~ [09] ]] && [[ ! "${rpivers:0:3}" =~ 902 ]]; then
     echo "This RPi1 is not supported (not true armhf).  Exiting..."
     exit 7