diff --git a/ssh_config_utils/config_file.py b/ssh_config_utils/config_file.py
index 883d54f..a6b2786 100644
--- a/ssh_config_utils/config_file.py
+++ b/ssh_config_utils/config_file.py
@@ -5,6 +5,8 @@ from ssh_config_utils.parser import parse_config_text
 
 
 class HostGroup:
+    SEPARATOR = "/"
+
     def __init__(self, name):
         self.parent = None
         self.name = name
@@ -24,7 +26,7 @@ class HostGroup:
     def fullpath(self):
         if self.parent is None:
             return ""
-        return ".".join(self.parent.fullpath(), self.name)
+        return HostGroup.SEPARATOR.join(self.parent.fullpath(), self.name)
 
     def hosts(self):
         for child in self.children.values():
@@ -106,7 +108,7 @@ class GroupedConfigFile(ConfigFile):
         host: Host
         for host in hosts:
             current = self.root_group
-            parts = host.name.split(".")
+            parts = host.name.split(HostGroup.SEPARATOR)
             host.name = parts[-1]
             for path in parts[:-1]:
                 current = current.add_child_group(path)