diff --git a/src/errors.h b/src/errors.h
index f1c36ad..445a9b8 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -3452,4 +3452,6 @@
 #ifdef FEAT_EVAL
 EXTERN char e_cannot_use_non_null_object[]
 	INIT(= N_("E1362: Cannot use a non-null object"));
+EXTERN char e_incomplete_type[]
+	INIT(= N_("E1363: Incomplete type"));
 #endif