diff --git a/libs/tools.py b/libs/tools.py
index 373f2f3..e84bd38 100644
--- a/libs/tools.py
+++ b/libs/tools.py
@@ -25,7 +25,7 @@ def resolve_identifier(repo, identifier):
             for ip in config.get('ipv4', set()):
                 found_ips.add(ip_address(ip))
 
-        if node.metadata.get('external_ipv4'):
+        if node.metadata.get('external_ipv4', None):
             found_ips.add(ip_address(node.metadata.get('external_ipv4')))
 
     return found_ips