diff --git a/src/proto/gui_w32.pro b/src/proto/gui_w32.pro
index cab3343..c5c6585 100644
--- a/src/proto/gui_w32.pro
+++ b/src/proto/gui_w32.pro
@@ -96,5 +96,5 @@
 BalloonEval *gui_mch_create_beval_area(void *target, char_u *mesg, void (*mesgCB)(BalloonEval *, int), void *clientData);
 void gui_mch_destroy_beval_area(BalloonEval *beval);
 void netbeans_draw_multisign_indicator(int row);
-int test_gui_w32_sendevent(dict_T *args);
+int test_gui_w32_sendevent(char_u *event, dict_T *args);
 /* vim: set ft=c : */
diff --git a/src/proto/os_win32.pro b/src/proto/os_win32.pro
index a6bbd33..9f8b969 100644
--- a/src/proto/os_win32.pro
+++ b/src/proto/os_win32.pro
@@ -9,6 +9,7 @@
 void PlatformId(void);
 void mch_setmouse(int on);
 void mch_bevalterm_changed(void);
+int test_mswin_event(char_u *event, dict_T *args);
 void mch_update_cursor(void);
 int mch_char_avail(void);
 int mch_check_messages(void);
diff --git a/src/proto/testing.pro b/src/proto/testing.pro
index 2192e91..dea4f75 100644
--- a/src/proto/testing.pro
+++ b/src/proto/testing.pro
@@ -33,6 +33,7 @@
 void f_test_unknown(typval_T *argvars, typval_T *rettv);
 void f_test_void(typval_T *argvars, typval_T *rettv);
 void f_test_setmouse(typval_T *argvars, typval_T *rettv);
+void f_test_mswin_event(typval_T *argvars, typval_T *rettv);
 void f_test_gui_event(typval_T *argvars, typval_T *rettv);
 void f_test_settime(typval_T *argvars, typval_T *rettv);
 /* vim: set ft=c : */