diff --git a/src/proto/screen.pro b/src/proto/screen.pro
index 31f97d5..a4df626 100644
--- a/src/proto/screen.pro
+++ b/src/proto/screen.pro
@@ -26,7 +26,7 @@
 void screen_putchar __ARGS((int c, int row, int col, int attr));
 void screen_getbytes __ARGS((int row, int col, char_u *bytes, int *attrp));
 void screen_puts __ARGS((char_u *text, int row, int col, int attr));
-void screen_puts_len __ARGS((char_u *text, int len, int row, int col, int attr));
+void screen_puts_len __ARGS((char_u *text, int textlen, int row, int col, int attr));
 void screen_stop_highlight __ARGS((void));
 void reset_cterm_colors __ARGS((void));
 void screen_draw_rectangle __ARGS((int row, int col, int height, int width, int invert));