diff --git a/src/conf_mode/service_dhcp-server.py b/src/conf_mode/service_dhcp-server.py
index 144739372f..a1294d77e1 100755
--- a/src/conf_mode/service_dhcp-server.py
+++ b/src/conf_mode/service_dhcp-server.py
@@ -306,7 +306,7 @@ def verify(dhcp):
                     # If a client class has been specified then it must exist
                     if 'client_class' in range_config:
                         client_class = range_config['client_class']
-                       if client_class not in dhcp.get('client_class', {}):
+                        if client_class not in dhcp.get('client_class', {}):
                             raise ConfigError(f'Client class "{client_class}" set in range "{range}" but does not exist')
 
                     # Start/Stop address must be inside network