diff --git a/data/hooks/diagnosis/21-web.py b/data/hooks/diagnosis/21-web.py
index 56b054e53..2d0344abe 100644
--- a/data/hooks/diagnosis/21-web.py
+++ b/data/hooks/diagnosis/21-web.py
@@ -75,7 +75,7 @@ class WebDiagnoser(Diagnoser):
             global_ipv4 = ipv4.get("data", {}).get("global", {})
             if global_ipv4:
                 try:
-                    requests.head("http://" + ipv4, timeout=5)
+                    requests.head("http://" + global_ipv4, timeout=5)
                 except requests.exceptions.Timeout as e:
                     yield dict(meta={"test": "hairpinning"},
                                status="WARNING",