diff --git a/src/errors.h b/src/errors.h
index 4b58cbb..ed77212 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -1570,9 +1570,12 @@
 EXTERN char e_unknown_printer_font_str[]
 	INIT(= N_("E613: Unknown printer font: %s"));
 #endif
-// E614 unused
-// E615 unused
-// E616 unused
+EXTERN char e_class_required[]
+	INIT(= N_("E614: Class required"));
+EXTERN char e_object_required[]
+	INIT(= N_("E615: Object required"));
+EXTERN char e_object_required_for_argument_nr[]
+	INIT(= N_("E616: Object required for argument %d"));
 #ifdef FEAT_GUI_GTK
 EXTERN char e_cannot_be_changed_in_gtk_GUI[]
 	INIT(= N_("E617: Cannot be changed in the GTK GUI"));
@@ -1777,7 +1780,8 @@
 	INIT(= N_("E691: Can only compare List with List"));
 EXTERN char e_invalid_operation_for_list[]
 	INIT(= N_("E692: Invalid operation for List"));
-// E693 unused
+EXTERN char e_list_or_class_required_for_argument_nr[]
+	INIT(= N_("E693: List or Class required for argument %d"));
 EXTERN char e_invalid_operation_for_funcrefs[]
 	INIT(= N_("E694: Invalid operation for Funcrefs"));
 EXTERN char e_cannot_index_a_funcref[]