--- a/scaffold.c
+++ b/scaffold.c
@@ -20,13 +20,12 @@ static char sccs_id[] = "@(#) scaffold.c
 #include <syslog.h>
 #include <setjmp.h>
 #include <string.h>
+#include <stdlib.h>
 
 #ifndef INADDR_NONE
 #define	INADDR_NONE	(-1)		/* XXX should be 0xffffffff */
 #endif
 
-extern char *malloc();
-
 /* Application-specific. */
 
 #include "tcpd.h"
