diff --git a/libasn1parser/asn1p_constr.c b/libasn1parser/asn1p_constr.c
index 9e5e6e6a3d7719efb5eee5a1b07e36c54059cbfa..bce4272f29c689a73c7a665f776e70ad2bee84e4 100644
--- a/libasn1parser/asn1p_constr.c
+++ b/libasn1parser/asn1p_constr.c
@@ -151,6 +151,8 @@ asn1p_constraint_type2str(enum asn1p_constraint_type_e type) {
 		return "INTERSECTION";
 	case ACT_CA_EXC:
 		return "EXCEPT";
+	case ACT_CA_AEX:
+		return "ALL EXCEPT";
 	}
 	return "UNKNOWN";
 }