diff --git a/sys/kern/makesyscalls.sh b/sys/kern/makesyscalls.sh
index e586602c85e9..ca28aaf24b60 100644
--- a/sys/kern/makesyscalls.sh
+++ b/sys/kern/makesyscalls.sh
@@ -9,6 +9,7 @@ compat=COMPAT_43
 compat4=COMPAT_FREEBSD4
 compat6=COMPAT_FREEBSD6
 compat7=COMPAT_FREEBSD7
+compat10=COMPAT_FREEBSD10
 
 # output files:
 sysnames="syscalls.c"
@@ -33,6 +34,8 @@ syscompat6="sysent.compat6.$$"
 syscompat6dcl="sysent.compat6dcl.$$"
 syscompat7="sysent.compat7.$$"
 syscompat7dcl="sysent.compat7dcl.$$"
+syscompat10="sysent.compat10.$$"
+syscompat10dcl="sysent.compat10dcl.$$"
 sysent="sysent.switch.$$"
 sysinc="sysinc.switch.$$"
 sysarg="sysarg.switch.$$"
@@ -47,9 +50,9 @@ else
 	capenabled=""
 fi
 
-trap "rm $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $syscompat7 $syscompat7dcl $sysent $sysinc $sysarg $sysprotoend $systracetmp $systraceret" 0
+trap "rm $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $syscompat7 $syscompat7dcl $syscompat10 $syscompat10dcl $sysent $sysinc $sysarg $sysprotoend $systracetmp $systraceret" 0
 
-touch $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $syscompat7 $syscompat7dcl $sysent $sysinc $sysarg $sysprotoend $systracetmp $systraceret
+touch $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $syscompat7 $syscompat7dcl $syscompat10 $syscompat10dcl $sysent $sysinc $sysarg $sysprotoend $systracetmp $systraceret
 
 case $# in
     0)	echo "usage: $0 input-file <config-file>" 1>&2
@@ -88,6 +91,8 @@ s/\$//g
 		syscompat6dcl = \"$syscompat6dcl\"
 		syscompat7 = \"$syscompat7\"
 		syscompat7dcl = \"$syscompat7dcl\"
+		syscompat10 = \"$syscompat10\"
+		syscompat10dcl = \"$syscompat10dcl\"
 		sysent = \"$sysent\"
 		syssw = \"$syssw\"
 		sysinc = \"$sysinc\"
@@ -102,6 +107,7 @@ s/\$//g
 		compat4 = \"$compat4\"
 		compat6 = \"$compat6\"
 		compat7 = \"$compat7\"
+		compat10 = \"$compat10\"
 		syscallprefix = \"$syscallprefix\"
 		switchname = \"$switchname\"
 		namesname = \"$namesname\"
@@ -123,6 +129,7 @@ s/\$//g
 		printf "\n#ifdef %s\n\n", compat4 > syscompat4
 		printf "\n#ifdef %s\n\n", compat6 > syscompat6
 		printf "\n#ifdef %s\n\n", compat7 > syscompat7
+		printf "\n#ifdef %s\n\n", compat10 > syscompat10
 
 		printf "/*\n * System call names.\n *\n" > sysnames
 		printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
@@ -206,6 +213,7 @@ s/\$//g
 		print > syscompat4
 		print > syscompat6
 		print > syscompat7
+		print > syscompat10
 		print > sysnames
 		print > systrace
 		print > systracetmp
@@ -221,6 +229,7 @@ s/\$//g
 		print > syscompat4
 		print > syscompat6
 		print > syscompat7
+		print > syscompat10
 		print > sysnames
 		print > systrace
 		print > systracetmp
@@ -236,6 +245,7 @@ s/\$//g
 		print > syscompat4
 		print > syscompat6
 		print > syscompat7
+		print > syscompat10
 		print > sysnames
 		print > systrace
 		print > systracetmp
@@ -342,6 +352,8 @@ s/\$//g
 				argalias = "freebsd6_" argalias
 			if (flag("COMPAT7"))
 				argalias = "freebsd7_" argalias
+			if (flag("COMPAT10"))
+				argalias = "freebsd10_" argalias
 		}
 		f++
 
@@ -493,7 +505,7 @@ s/\$//g
 		next
 	}
 	type("COMPAT") || type("COMPAT4") || type("COMPAT6") || \
-	    type("COMPAT7") {
+	    type("COMPAT7") || type("COMPAT10") {
 		if (flag("COMPAT")) {
 			ncompat++
 			out = syscompat
@@ -522,6 +534,13 @@ s/\$//g
 			wrap = "compat7"
 			prefix = "freebsd7_"
 			descr = "freebsd7"
+		} else if (flag("COMPAT10")) {
+			ncompat10++
+			out = syscompat10
+			outdcl = syscompat10dcl
+			wrap = "compat10"
+			prefix = "freebsd10_"
+			descr = "freebsd10"
 		}
 		parseline()
 		if (argc != 0 && !flag("NOARGS") && !flag("NOPROTO") && \
@@ -559,7 +578,8 @@ s/\$//g
 		printf("/* %d = %s %s */\n", syscall, descr, funcalias) > sysent
 		printf("\t\"%s.%s\",\t\t/* %d = %s %s */\n",
 		    wrap, funcalias, syscall, descr, funcalias) > sysnames
-		if (flag("COMPAT") || flag("COMPAT4") || flag("COMPAT6")) {
+		# XXX-BD: why no COMPAT7?
+		if (flag("COMPAT") || flag("COMPAT4") || flag("COMPAT6") || flag("COMPAT10")) {
 			printf("\t\t\t\t/* %d is %s %s */\n",
 			    syscall, descr, funcalias) > syshdr
 		} else if (!flag("NODEF")) {
@@ -596,7 +616,7 @@ s/\$//g
 	END {
 		printf "\n#define AS(name) (sizeof(struct name) / sizeof(register_t))\n" > sysinc
 
-		if (ncompat != 0 || ncompat4 != 0 || ncompat6 != 0 || ncompat7 != 0)
+		if (ncompat != 0 || ncompat4 != 0 || ncompat6 != 0 || ncompat7 != 0 || ncompat10 != 0)
 			printf "#include \"opt_compat.h\"\n\n" > syssw
 
 		if (ncompat != 0) {
@@ -630,11 +650,18 @@ s/\$//g
 			printf "#define compat7(n, name) 0, (sy_call_t *)nosys\n" > sysinc
 			printf "#endif\n" > sysinc
 		}
-
+		if (ncompat10 != 0) {
+			printf "\n#ifdef %s\n", compat10 > sysinc
+			printf "#define compat10(n, name) n, (sy_call_t *)__CONCAT(freebsd10_,name)\n" > sysinc
+			printf "#else\n" > sysinc
+			printf "#define compat10(n, name) 0, (sy_call_t *)nosys\n" > sysinc
+			printf "#endif\n" > sysinc
+		}
 		printf("\n#endif /* %s */\n\n", compat) > syscompatdcl
 		printf("\n#endif /* %s */\n\n", compat4) > syscompat4dcl
 		printf("\n#endif /* %s */\n\n", compat6) > syscompat6dcl
 		printf("\n#endif /* %s */\n\n", compat7) > syscompat7dcl
+		printf("\n#endif /* %s */\n\n", compat10) > syscompat10dcl
 
 		printf("\n#undef PAD_\n") > sysprotoend
 		printf("#undef PADL_\n") > sysprotoend
@@ -657,6 +684,7 @@ cat $sysarg $sysdcl \
 	$syscompat4 $syscompat4dcl \
 	$syscompat6 $syscompat6dcl \
 	$syscompat7 $syscompat7dcl \
+	$syscompat10 $syscompat10dcl \
 	$sysaue $sysprotoend > $sysproto
 cat $systracetmp >> $systrace
 cat $systraceret >> $systrace