diff --git a/src/errors.h b/src/errors.h
index 937c59d..d6b82bb 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -2791,8 +2791,10 @@
 // E1080 unused
 EXTERN char e_cannot_unlet_str[]
 	INIT(= N_("E1081: Cannot unlet %s"));
+#endif
 EXTERN char e_command_modifier_without_command[]
 	INIT(= N_("E1082: Command modifier without command"));
+#ifdef FEAT_EVAL
 EXTERN char e_missing_backtick[]
 	INIT(= N_("E1083: Missing backtick"));
 EXTERN char e_cannot_delete_vim9_script_function_str[]