Index: multimedia/webcamd/Makefile
===================================================================
--- multimedia/webcamd/Makefile
+++ multimedia/webcamd/Makefile
@@ -76,6 +76,11 @@
 MAKE_ARGS+=	HAVE_MAN="YES"
 MAKE_ARGS+=	PTHREAD_LIBS="-lpthread"
 
+.include <bsd.port.pre.mk>
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1200031
+EXTRA_PATCHES+=        ${PATCHDIR}/extra-patch-ino64
+.endif
+
 do-configure:
 	${MAKE} -C${WRKSRC}/tools/linux_make
 	${MAKE} ${MAKE_ARGS} configure -C${WRKSRC}
@@ -87,4 +92,4 @@
 	@${MKDIR} ${STAGEDIR}${PREFIX}/etc/devd
 	${INSTALL_DATA} "${WRKDIR}/webcamd.conf" ${STAGEDIR}${PREFIX}/etc/devd
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>
Index: multimedia/webcamd/files/extra-patch-ino64
===================================================================
--- multimedia/webcamd/files/extra-patch-ino64
+++ multimedia/webcamd/files/extra-patch-ino64
@@ -0,0 +1,43 @@
+--- kernel/linux_func.c.orig	2017-05-07 09:15:00.252932000 +0000
++++ kernel/linux_func.c	2017-05-07 09:16:38.466562000 +0000
+@@ -813,9 +813,9 @@
+ 
+ error:
+ 	printf("Trying to register "
+-	    "unknown device(0x%08x) "
++	    "unknown device(0x%08jx) "
+ 	    "or subdevice(%d) too big.\n",
+-	    mm, (int)subdev);
++	    (uintmax_t)mm, (int)subdev);
+ 	return;
+ }
+ 
+@@ -891,7 +891,7 @@
+ 
+ error:
+ 	printf("Cannot register character "
+-	    "device mm=0x%08x and desc='%s'.\n", mm, desc);
++	    "device mm=0x%08jx and desc='%s'.\n", (uintmax_t)mm, desc);
+ 	return (-1);
+ }
+ 
+@@ -899,7 +899,7 @@
+ unregister_chrdev(dev_t mm, const char *desc)
+ {
+ 	printf("Cannot unregister character "
+-	    "device mm=0x%08x and desc='%s'.\n", mm, desc);
++	    "device mm=0x%08jx and desc='%s'.\n", (uintmax_t)mm, desc);
+ 	return (-1);
+ }
+ 
+--- kernel/linux_defs.h.orig	2017-05-07 09:17:46.386422000 +0000
++++ kernel/linux_defs.h	2017-05-07 09:18:05.156924000 +0000
+@@ -703,7 +703,7 @@
+ 
+ #endif
+ typedef uint32_t gfp_t;
+-typedef uint32_t dev_t;
++typedef uint64_t dev_t;
+ typedef struct timespec ktime_t;
+ 
+ #endif					/* _LINUX_DEFS_H_ */