diff --git a/src/proto/gui_beval.pro b/src/proto/gui_beval.pro
index 42e0082..33c1738 100644
--- a/src/proto/gui_beval.pro
+++ b/src/proto/gui_beval.pro
@@ -1,11 +1,11 @@
 /* gui_beval.c */
-extern void general_beval_cb __ARGS((BalloonEval *beval, int state));
-extern BalloonEval *gui_mch_create_beval_area __ARGS((void *target, char_u *mesg, void (*mesgCB)(BalloonEval *, int), void *clientData));
-extern void gui_mch_destroy_beval_area __ARGS((BalloonEval *beval));
-extern void gui_mch_enable_beval_area __ARGS((BalloonEval *beval));
-extern void gui_mch_disable_beval_area __ARGS((BalloonEval *beval));
-extern BalloonEval *gui_mch_currently_showing_beval __ARGS((void));
-extern int get_beval_info __ARGS((BalloonEval *beval, int getword, win_T **winp, linenr_T *lnump, char_u **textp, int *colp));
-extern void gui_mch_post_balloon __ARGS((BalloonEval *beval, char_u *mesg));
-extern void gui_mch_unpost_balloon __ARGS((BalloonEval *beval));
+void general_beval_cb __ARGS((BalloonEval *beval, int state));
+BalloonEval *gui_mch_create_beval_area __ARGS((void *target, char_u *mesg, void (*mesgCB)(BalloonEval *, int), void *clientData));
+void gui_mch_destroy_beval_area __ARGS((BalloonEval *beval));
+void gui_mch_enable_beval_area __ARGS((BalloonEval *beval));
+void gui_mch_disable_beval_area __ARGS((BalloonEval *beval));
+BalloonEval *gui_mch_currently_showing_beval __ARGS((void));
+int get_beval_info __ARGS((BalloonEval *beval, int getword, win_T **winp, linenr_T *lnump, char_u **textp, int *colp));
+void gui_mch_post_balloon __ARGS((BalloonEval *beval, char_u *mesg));
+void gui_mch_unpost_balloon __ARGS((BalloonEval *beval));
 /* vim: set ft=c : */