diff --git a/src/errors.h b/src/errors.h
index b86b1c3..7344e2e 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -3414,4 +3414,12 @@
 	INIT(= N_("E1344: Cannot initialize a member in an interface"));
 EXTERN char e_not_valid_command_in_interface_str[]
 	INIT(= N_("E1345: Not a valid command in an interface: %s"));
+EXTERN char e_interface_name_not_found_str[]
+	INIT(= N_("E1346: Interface name not found: %s"));
+EXTERN char e_not_valid_interface_str[]
+	INIT(= N_("E1347: Not a valid interface: %s"));
+EXTERN char e_member_str_of_interface_str_not_implemented[]
+	INIT(= N_("E1348: Member \"%s\" of interface \"%s\" not implemented"));
+EXTERN char e_function_str_of_interface_str_not_implemented[]
+	INIT(= N_("E1349: Function \"%s\" of interface \"%s\" not implemented"));
 #endif