diff --git a/include/ldap.h b/include/ldap.h
index 9b4a009b03d420e3625235c98d59c8c312242be3..24f2dc731196c85999963a75d663e92c5d7c4876 100644
--- a/include/ldap.h
+++ b/include/ldap.h
@@ -252,6 +252,7 @@ typedef struct ldapcontrol {
 #define LDAP_RES_RENAME			LDAP_RES_MODRDN	/* application + constructed */
 #define LDAP_RES_COMPARE		((ber_tag_t) 0x6fU)	/* application + constructed */
 #define LDAP_RES_EXTENDED		((ber_tag_t) 0x78U)	/* V3: application + constructed */
+#define LDAP_RES_EXTENDED_PARTIAL	((ber_tag_t) 0x79U)	/* V3+: application + constructed */
 
 #define LDAP_RES_ANY			((ber_tag_t)(-1))
 #define LDAP_RES_UNSOLICITED	((ber_tag_t)(0))