diff --git a/include/ldap.h b/include/ldap.h
index a6acd33c81..9ce21953c9 100644
--- a/include/ldap.h
+++ b/include/ldap.h
@@ -486,6 +486,8 @@ typedef struct ldapcontrol {
 #define LDAP_CUP_RELOAD_REQUIRED		0x105
 #endif
 
+#define LDAP_ASSERTION_FAILED			0x10f
+
 #ifdef LDAP_EXOP_X_CANCEL
 /* resultCode for Cancel Response */
 #define LDAP_CANCELLED					0x110
diff --git a/libraries/libldap/error.c b/libraries/libldap/error.c
index 464b9e5172..079eca6e5c 100644
--- a/libraries/libldap/error.c
+++ b/libraries/libldap/error.c
@@ -93,6 +93,8 @@ static struct ldaperror ldap_builtin_errlist[] = {
 	{LDAP_CLIENT_LOOP,				N_("Client Loop")},
 	{LDAP_REFERRAL_LIMIT_EXCEEDED,	N_("Referral Limit Exceeded")},
 
+	{LDAP_ASSERTION_FAILED,			N_("Assertion Failed")},
+
 #ifdef LDAP_CLIENT_UPDATE
 	{LDAP_CUP_RESOURCES_EXHAUSTED,	N_("Client Update Resource Exhausted")},
 	{LDAP_CUP_SECURITY_VIOLATION,	N_("Client Update Security Violation")},