diff --git a/tools/apidoc/gen_toc.py b/tools/apidoc/gen_toc.py
index 2d96b1b2075..9c53a48ec52 100644
--- a/tools/apidoc/gen_toc.py
+++ b/tools/apidoc/gen_toc.py
@@ -118,7 +118,7 @@ known_categories = {
     'TrafficType': 'Usage',
     'Product': 'Product',
     'LB': 'Load Balancer',
-    'Ldap': 'LDAP',
+    'ldap': 'LDAP',
     'Swift': 'Swift',
     'S3' : 'S3',
     'SecondaryStorage': 'Host',