--- OLD/xc/programs/xterm/screen.c	Thu Jan  1 00:00:00 1970
+++ NEW/xc/programs/xterm/screen.c	Thu Jan  1 00:00:00 1970
@@ -55,8 +55,7 @@
 #endif
 #endif
 
-extern Char *calloc(), *malloc(), *realloc();
-extern void free();
+#include <stdlib.h>
 
 ScrnBuf Allocate (nrow, ncol, addr)
 /*