diff --git a/install_usr.sh b/install_usr.sh
index 25cbaff..29f432c 100755
--- a/install_usr.sh
+++ b/install_usr.sh
@@ -1,7 +1,7 @@
 #! /bin/bash
 set -e 
 
-if [[ $EUID -ne 0 ]]; then
+if [[ $EUID -eq 0 ]]; then
   echo "Cannot run as root."
   exit
 fi