diff --git a/ct/unifi.sh b/ct/unifi.sh
index 820930c0..cec984c5 100644
--- a/ct/unifi.sh
+++ b/ct/unifi.sh
@@ -17,6 +17,10 @@ cat <<"EOF"
 EOF
 }
 header_info
+if ! grep -q -m1 'avx[^ ]*' /proc/cpuinfo; then
+  echo "AVX instruction set is not supported on this CPU."
+  exit
+fi
 echo -e "Loading..."
 APP="Unifi"
 var_disk="8"