diff --git a/src/proto/hashtable.pro b/src/proto/hashtable.pro
index aebb458..9072376 100644
--- a/src/proto/hashtable.pro
+++ b/src/proto/hashtable.pro
@@ -1,6 +1,7 @@
 /* hashtable.c */
 void hash_init __ARGS((hashtab_T *ht));
 void hash_clear __ARGS((hashtab_T *ht));
+void hash_clear_all __ARGS((hashtab_T *ht, int off));
 hashitem_T *hash_find __ARGS((hashtab_T *ht, char_u *key));
 hashitem_T *hash_lookup __ARGS((hashtab_T *ht, char_u *key, hash_T hash));
 void hash_debug_results __ARGS((void));