--- screen.c.orig	Fri Apr 28 14:22:37 2017
+++ screen.c	Fri Apr 28 14:23:27 2017
@@ -245,6 +245,7 @@ Reallocate(sbuf, sbufaddr, nrow, ncol, oldrow, oldcol)
 #endif /* !KTERM */
 }
 
+void
 #ifdef KTERM
 ScreenWrite (screen, str, flags, gset, length)
 #else /* !KTERM */
