diff --git a/include/ldap.h b/include/ldap.h
index 9ce21953c9..e58d052b8e 100644
--- a/include/ldap.h
+++ b/include/ldap.h
@@ -181,6 +181,9 @@ typedef struct ldapcontrol {
 
 /* LDAP Controls */
 #define LDAP_CONTROL_ASSERT			"1.3.6.1.4.1.4203.666.5.9"
+#define LDAP_CONTROL_PRE_READ_BACK	"1.3.6.1.4.1.4203.666.5.10.1"
+#define LDAP_CONTROL_POST_READ_BACK	"1.3.6.1.4.1.4203.666.5.10.2"
+
 #define LDAP_CONTROL_VALUESRETURNFILTER "1.2.826.0.1.334810.2.3"
 #define LDAP_CONTROL_SUBENTRIES		"1.3.6.1.4.1.4203.1.10.1"
 #define LDAP_CONTROL_NOOP			"1.3.6.1.4.1.4203.1.10.2"