diff --git a/src/proto/insexpand.pro b/src/proto/insexpand.pro
index 8529b7b..e9ff626 100644
--- a/src/proto/insexpand.pro
+++ b/src/proto/insexpand.pro
@@ -67,4 +67,5 @@
 int ins_complete(int c, int enable_pum);
 void free_insexpand_stuff(void);
 int ins_compl_cancel(void);
+void f_complete_match(typval_T *argvars, typval_T *rettv);
 /* vim: set ft=c : */