diff --git a/bin/pwd/Makefile b/bin/pwd/Makefile
index 129ed63cbdbe..4d070983477d 100644
--- a/bin/pwd/Makefile
+++ b/bin/pwd/Makefile
@@ -5,4 +5,6 @@ PROG=	pwd
 LINKS=	${BINDIR}/pwd ${BINDIR}/realpath
 MAN=	pwd.1 realpath.1
 
+WARNS=	2
+
 .include <bsd.prog.mk>
diff --git a/bin/pwd/pwd.c b/bin/pwd/pwd.c
index b8396176e7ed..886bbb983bd5 100644
--- a/bin/pwd/pwd.c
+++ b/bin/pwd/pwd.c
@@ -51,6 +51,7 @@ static const char rcsid[] =
 #include <unistd.h>
 #include <sys/param.h>
 
+int main __P((int, char *[]));
 void usage __P((void));
 
 int
@@ -85,7 +86,7 @@ main(argc, argv)
 			err(1, "%s", argv[0]);
 		(void)printf("%s\n", p);
 	} else  if (argc == 0) {
-		p = getcwd(NULL, 0);
+		p = getcwd(NULL, (size_t)0);
 		if (p == NULL)
 			err(1, ".");
 		(void)printf("%s\n", p);