diff --git a/src/proto/if_python3.pro b/src/proto/if_python3.pro
index d402ecb..74b2be4 100644
--- a/src/proto/if_python3.pro
+++ b/src/proto/if_python3.pro
@@ -6,6 +6,7 @@
 void ex_py3file __ARGS((exarg_T *eap));
 void python3_buffer_free __ARGS((buf_T *buf));
 void python3_window_free __ARGS((win_T *win));
+void python3_tabpage_free __ARGS((tabpage_T *tab));
 void do_py3eval __ARGS((char_u *str, typval_T *rettv));
 void set_ref_in_python3 __ARGS((int copyID));
 /* vim: set ft=c : */