diff --git a/src/gfx_func.h b/src/gfx_func.h
--- a/src/gfx_func.h
+++ b/src/gfx_func.h
@@ -71,7 +71,7 @@ extern Dimension _cur_resolution;
 extern Palette _cur_palette; ///< Current palette
 
 void HandleKeypress(uint keycode, WChar key);
-void HandleTextInput(const char *str, bool marked = false, const char *caret = NULL);
+void HandleTextInput(const char *str, bool marked = false, const char *caret = NULL, const char *insert_location = NULL, const char *replacement_end = NULL);
 void HandleCtrlChanged();
 void HandleMouseEvents();
 void CSleep(int milliseconds);