diff --git a/src/proto/filepath.pro b/src/proto/filepath.pro
index 53fa4ec..46f51cb 100644
--- a/src/proto/filepath.pro
+++ b/src/proto/filepath.pro
@@ -6,6 +6,7 @@
 void f_delete(typval_T *argvars, typval_T *rettv);
 void f_executable(typval_T *argvars, typval_T *rettv);
 void f_exepath(typval_T *argvars, typval_T *rettv);
+void f_filecopy(typval_T *argvars, typval_T *rettv);
 void f_filereadable(typval_T *argvars, typval_T *rettv);
 void f_filewritable(typval_T *argvars, typval_T *rettv);
 void f_finddir(typval_T *argvars, typval_T *rettv);