diff --git a/cpukit/libnetworking/sys/mbuf.h b/cpukit/libnetworking/sys/mbuf.h
index 813d920c7b..450787573c 100644
--- a/cpukit/libnetworking/sys/mbuf.h
+++ b/cpukit/libnetworking/sys/mbuf.h
@@ -92,10 +92,10 @@ struct	pkthdr {
 struct m_ext {
 	caddr_t	ext_buf;		/* start of buffer */
 	void	(*ext_free)		/* free routine if not the usual */
-		__P((caddr_t, u_int));
+		(caddr_t, u_int);
 	u_int	ext_size;		/* size of buffer, for ext_free */
 	void	(*ext_ref)		/* add a reference to the ext object */
-		__P((caddr_t, u_int));
+		(caddr_t, u_int);
 };
 
 /*
diff --git a/cpukit/libnetworking/sys/rtprio.h b/cpukit/libnetworking/sys/rtprio.h
index 843cf8cd1f..712693f684 100644
--- a/cpukit/libnetworking/sys/rtprio.h
+++ b/cpukit/libnetworking/sys/rtprio.h
@@ -64,7 +64,7 @@ struct rtprio {
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS
-int	rtprio __P((int, pid_t, struct rtprio *));
+int	rtprio (int, pid_t, struct rtprio *);
 __END_DECLS
 #endif	/* !_KERNEL */
 #endif	/* !_SYS_RTPRIO_H_ */