diff --git a/src/pretix/base/templatetags/phone_format.py b/src/pretix/base/templatetags/phone_format.py
index 8d834c84c..12f7317e0 100644
--- a/src/pretix/base/templatetags/phone_format.py
+++ b/src/pretix/base/templatetags/phone_format.py
@@ -10,7 +10,7 @@ def phone_format(value: str):
     if not value:
         return ""
 
-    if isinstance(value, PhoneNumber):
+    if isinstance(value, PhoneNumber) and value.as_international:
         return value.as_international
 
     try: