diff --git a/src/proto/spell.pro b/src/proto/spell.pro
index 2771a90..900f3bf 100644
--- a/src/proto/spell.pro
+++ b/src/proto/spell.pro
@@ -11,4 +11,5 @@
 void init_spell_chartab __ARGS((void));
 void spell_suggest __ARGS((void));
 void spell_suggest_list __ARGS((garray_T *gap, char_u *word, int maxcount));
+void ex_spelldump __ARGS((exarg_T *eap));
 /* vim: set ft=c : */