diff --git a/include/ldap.h b/include/ldap.h
index 1584f64ea3..c90de2272b 100644
--- a/include/ldap.h
+++ b/include/ldap.h
@@ -190,7 +190,7 @@ typedef struct ldapcontrol {
 
 #define LDAP_CONTROL_MANAGEDSAIT	"2.16.840.1.113730.3.4.2"
 #define LDAP_CONTROL_SUBENTRIES		"1.3.6.1.4.1.4203.1.10.1"
-#define LDAP_CONTROL_NOOP			"1.3.6.1.4.1.4203.666.5.2"
+#define LDAP_CONTROL_NOOP			"1.3.6.1.4.1.4203.1.10.2"
 
 #define LDAP_CONTROL_DUPENT_REQUEST		"2.16.840.1.113719.1.27.101.1"
 #define LDAP_CONTROL_DUPENT_RESPONSE	"2.16.840.1.113719.1.27.101.2"