diff --git a/src/proto/gui_kde_x11.pro b/src/proto/gui_kde_x11.pro
index eb6a286..b94b979 100644
--- a/src/proto/gui_kde_x11.pro
+++ b/src/proto/gui_kde_x11.pro
@@ -26,6 +26,7 @@
 guicolor_T gui_mch_get_color __ARGS((char_u *name));
 void gui_mch_set_fg_color __ARGS((guicolor_T color));
 void gui_mch_set_bg_color __ARGS((guicolor_T color));
+void gui_mch_set_sp_color __ARGS((guicolor_T color));
 void gui_mch_draw_string __ARGS((int row, int col, char_u *s, int len, int flags));
 int gui_mch_haskey __ARGS((char_u *name));
 int gui_get_x11_windis __ARGS((Window *win, Display **dis));
diff --git a/src/proto/gui_photon.pro b/src/proto/gui_photon.pro
index af33ef5..f6bb50e 100644
--- a/src/proto/gui_photon.pro
+++ b/src/proto/gui_photon.pro
@@ -30,6 +30,7 @@
 guicolor_T gui_mch_get_color __ARGS((char_u *name));
 void gui_mch_set_fg_color __ARGS((guicolor_T color));
 void gui_mch_set_bg_color __ARGS((guicolor_T color));
+void gui_mch_set_sp_color __ARGS((guicolor_T color));
 void gui_mch_invert_rectangle __ARGS((int row, int col, int nr, int nc));
 void gui_mch_clear_block __ARGS((int row1, int col1, int row2, int col2));
 void gui_mch_clear_all __ARGS((void));
diff --git a/src/proto/gui_w16.pro b/src/proto/gui_w16.pro
index 1b07a00..f1bb434 100644
--- a/src/proto/gui_w16.pro
+++ b/src/proto/gui_w16.pro
@@ -61,6 +61,7 @@
 void gui_mch_set_font __ARGS((GuiFont font));
 void gui_mch_set_fg_color __ARGS((guicolor_T color));
 void gui_mch_set_bg_color __ARGS((guicolor_T color));
+void gui_mch_set_sp_color __ARGS((guicolor_T color));
 void gui_mch_draw_string __ARGS((int row, int col, char_u *text, int len, int flags));
 void gui_mch_flush __ARGS((void));
 void gui_mch_add_menu __ARGS((vimmenu_T *menu, int pos));
diff --git a/src/proto/gui_w32.pro b/src/proto/gui_w32.pro
index 8eca7f1..c1fe955 100644
--- a/src/proto/gui_w32.pro
+++ b/src/proto/gui_w32.pro
@@ -63,6 +63,7 @@
 void gui_mch_set_font __ARGS((GuiFont font));
 void gui_mch_set_fg_color __ARGS((guicolor_T color));
 void gui_mch_set_bg_color __ARGS((guicolor_T color));
+void gui_mch_set_sp_color __ARGS((guicolor_T color));
 void im_set_font __ARGS((LOGFONT *lf));
 void im_set_position __ARGS((int row, int col));
 void im_set_active __ARGS((int active));