diff --git a/sys/netipsec/ipsec.h b/sys/netipsec/ipsec.h
--- a/sys/netipsec/ipsec.h
+++ b/sys/netipsec/ipsec.h
@@ -353,19 +353,19 @@
 int ipsec_process_done(struct mbuf *, struct secpolicy *, struct secasvar *,
     u_int);
 
-extern	void m_checkalignment(const char* where, struct mbuf *m0,
-		int off, int len);
-extern	struct mbuf *m_makespace(struct mbuf *m0, int skip, int hlen, int *off);
-extern	caddr_t m_pad(struct mbuf *m, int n);
-extern	int m_striphdr(struct mbuf *m, int skip, int hlen);
+void m_checkalignment(const char* where, struct mbuf *m0,
+    int off, int len);
+struct mbuf *m_makespace(struct mbuf *m0, int skip, int hlen, int *off);
+caddr_t m_pad(struct mbuf *m, int n);
+int m_striphdr(struct mbuf *m, int skip, int hlen);
 
 #endif /* _KERNEL */
 
 #ifndef _KERNEL
-extern caddr_t ipsec_set_policy(const char *, int);
-extern int ipsec_get_policylen(c_caddr_t);
-extern char *ipsec_dump_policy(c_caddr_t, const char *);
-extern const char *ipsec_strerror(void);
+caddr_t ipsec_set_policy(const char *, int);
+int ipsec_get_policylen(c_caddr_t);
+char *ipsec_dump_policy(c_caddr_t, const char *);
+const char *ipsec_strerror(void);
 
 #endif /* ! KERNEL */