diff --git a/src/proto/evalbuffer.pro b/src/proto/evalbuffer.pro
index 41616e7..d8ccdec 100644
--- a/src/proto/evalbuffer.pro
+++ b/src/proto/evalbuffer.pro
@@ -16,6 +16,7 @@
 void f_deletebufline(typval_T *argvars, typval_T *rettv);
 void f_getbufinfo(typval_T *argvars, typval_T *rettv);
 void f_getbufline(typval_T *argvars, typval_T *rettv);
+void f_getbufoneline(typval_T *argvars, typval_T *rettv);
 void f_getline(typval_T *argvars, typval_T *rettv);
 void f_setbufline(typval_T *argvars, typval_T *rettv);
 void f_setline(typval_T *argvars, typval_T *rettv);