diff --git a/routlin/core.py b/routlin/core.py
index d51c1c7..b7debb7 100644
--- a/routlin/core.py
+++ b/routlin/core.py
@@ -909,6 +909,8 @@ def main():
         return
 
     if args.view_metrics:
+        if not shared.is_root():
+            die("This script must be run as root (sudo).")
         metrics.show_metrics(data)
         return