diff --git a/sys/conf/Makefile.alpha b/sys/conf/Makefile.alpha
index eee034daa02b..bc749955a890 100644
--- a/sys/conf/Makefile.alpha
+++ b/sys/conf/Makefile.alpha
@@ -177,7 +177,7 @@ setdef1.o: setdef1.c setdefs.h
 	${NORMAL_C}
 
 setdef0.c setdef1.c setdefs.h: Makefile ${OBJS}
-	@perl5 $S/kern/gensetdefs.pl ${OBJS}
+	@gensetdefs ${OBJS}
 
 # this rule stops ./assym.s in .depend from causing problems
 ./assym.s: assym.s
diff --git a/sys/conf/Makefile.i386 b/sys/conf/Makefile.i386
index f42bd2f361b8..135c8683511e 100644
--- a/sys/conf/Makefile.i386
+++ b/sys/conf/Makefile.i386
@@ -182,7 +182,7 @@ setdef1.o: setdef1.c setdefs.h
 	${NORMAL_C}
 
 setdef0.c setdef1.c setdefs.h: Makefile ${OBJS}
-	@perl5 $S/kern/gensetdefs.pl ${OBJS}
+	@gensetdefs ${OBJS}
 
 # this rule stops ./assym.s in .depend from causing problems
 ./assym.s: assym.s
diff --git a/sys/conf/Makefile.pc98 b/sys/conf/Makefile.pc98
index a4bbe93c0c4c..7aef2a297ea5 100644
--- a/sys/conf/Makefile.pc98
+++ b/sys/conf/Makefile.pc98
@@ -184,7 +184,7 @@ setdef1.o: setdef1.c setdefs.h
 	${NORMAL_C}
 
 setdef0.c setdef1.c setdefs.h: Makefile ${OBJS}
-	@perl5 $S/kern/gensetdefs.pl ${OBJS}
+	@gensetdefs ${OBJS}
 
 # this rule stops ./assym.s in .depend from causing problems
 ./assym.s: assym.s
diff --git a/sys/conf/Makefile.powerpc b/sys/conf/Makefile.powerpc
index f42bd2f361b8..135c8683511e 100644
--- a/sys/conf/Makefile.powerpc
+++ b/sys/conf/Makefile.powerpc
@@ -182,7 +182,7 @@ setdef1.o: setdef1.c setdefs.h
 	${NORMAL_C}
 
 setdef0.c setdef1.c setdefs.h: Makefile ${OBJS}
-	@perl5 $S/kern/gensetdefs.pl ${OBJS}
+	@gensetdefs ${OBJS}
 
 # this rule stops ./assym.s in .depend from causing problems
 ./assym.s: assym.s
diff --git a/sys/conf/kmod.mk b/sys/conf/kmod.mk
index 6c5b31d00f4a..03fa4ed11034 100644
--- a/sys/conf/kmod.mk
+++ b/sys/conf/kmod.mk
@@ -131,7 +131,7 @@ PROG=	${KMOD}.ko
 
 ${PROG}: ${KMOD}.kld
 .if ${OBJFORMAT} == elf
-	perl5 @/kern/gensetdefs.pl ${KMOD}.kld
+	gensetdefs ${KMOD}.kld
 	${CC} ${CFLAGS} -c setdef0.c
 	${CC} ${CFLAGS} -c setdef1.c
 	${LD} -Bshareable ${LDFLAGS} -o ${.TARGET} setdef0.o ${KMOD}.kld setdef1.o