Index: sys/conf/files
===================================================================
--- sys/conf/files
+++ sys/conf/files
@@ -4254,7 +4254,7 @@
 netinet/sctp_auth.c		optional inet sctp | inet6 sctp
 netinet/sctp_bsd_addr.c		optional inet sctp | inet6 sctp
 netinet/sctp_cc_functions.c	optional inet sctp | inet6 sctp
-netinet/sctp_crc32.c		optional inet sctp | inet6 sctp
+netinet/sctp_crc32.c		optional inet | inet6
 netinet/sctp_indata.c		optional inet sctp | inet6 sctp
 netinet/sctp_input.c		optional inet sctp | inet6 sctp
 netinet/sctp_output.c		optional inet sctp | inet6 sctp
Index: sys/netinet/sctp_crc32.c
===================================================================
--- sys/netinet/sctp_crc32.c
+++ sys/netinet/sctp_crc32.c
@@ -35,6 +35,8 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include "opt_sctp.h"
+
 #include <netinet/sctp_os.h>
 #include <netinet/sctp.h>
 #include <netinet/sctp_crc32.h>
@@ -115,7 +117,7 @@
 	return (base);
 }
 
-
+#ifdef SCTP
 void
 sctp_delayed_cksum(struct mbuf *m, uint32_t offset)
 {
@@ -138,3 +140,4 @@
 	}
 	*(uint32_t *)(m->m_data + offset) = checksum;
 }
+#endif				/* SCTP */
Index: sys/netinet/sctp_os_bsd.h
===================================================================
--- sys/netinet/sctp_os_bsd.h
+++ sys/netinet/sctp_os_bsd.h
@@ -140,12 +140,14 @@
 /* then define the macro(s) that hook into the vimage macros */
 #define MODULE_GLOBAL(__SYMBOL) V_##__SYMBOL
 
+#ifdef SCTP
 #define V_system_base_info VNET(system_base_info)
 #define SCTP_BASE_INFO(__m) V_system_base_info.sctppcbinfo.__m
 #define SCTP_BASE_STATS V_system_base_info.sctpstat
 #define SCTP_BASE_STAT(__m) V_system_base_info.sctpstat.__m
 #define SCTP_BASE_SYSCTL(__m) V_system_base_info.sctpsysctl.__m
 #define SCTP_BASE_VAR(__m) V_system_base_info.__m
+#endif				/* SCTP */
 
 #define SCTP_PRINTF(params...)	printf(params)
 #if defined(SCTP_DEBUG)