diff --git a/include/s_serv.h b/include/s_serv.h
index 78f27f7..f35feba 100644
--- a/include/s_serv.h
+++ b/include/s_serv.h
@@ -72,7 +72,7 @@ struct Capability
 #define CAP_EUID	0x80000 /* supports EUID (ext UID + nonencap CHGHOST) */
 #define CAP_EOPMOD	0x100000 /* supports EOPMOD (ext +z + ext topic) */
 #define CAP_BAN		0x200000 /* supports propagated bans */
-#define CAP_BAN		0x400000 /* supports MLOCK messages */
+#define CAP_MLOCK	0x400000 /* supports MLOCK messages */
 
 #define CAP_MASK        (CAP_QS  | CAP_EX   | CAP_CHW  | \
                          CAP_IE  | CAP_KLN  | CAP_SERVICE |\