diff --git a/arpspoof.sh b/arpspoof.sh
index 89749c3..9518318 100755
--- a/arpspoof.sh
+++ b/arpspoof.sh
@@ -2,6 +2,11 @@
 
 set -ex
 
+if [[ $EUID -ne 0 ]]; then
+    echo "This script must be run as root" 1>&2
+    exit 1
+fi
+
 read -p "Wie heisst die Schnittstelle? [enp30s0\eth0] : " modul
 read -p "Wie heisst die IP? : " ip