diff --git a/lib/libc/aarch64/sys/Makefile.inc b/lib/libc/aarch64/sys/Makefile.inc
--- a/lib/libc/aarch64/sys/Makefile.inc
+++ b/lib/libc/aarch64/sys/Makefile.inc
@@ -6,6 +6,3 @@
 MDASM=	cerror.S \
 	syscall.S \
 	vfork.S
-
-# Don't generate default code for these syscalls:
-NOASM+=	vfork.o
diff --git a/lib/libc/amd64/sys/Makefile.inc b/lib/libc/amd64/sys/Makefile.inc
--- a/lib/libc/amd64/sys/Makefile.inc
+++ b/lib/libc/amd64/sys/Makefile.inc
@@ -5,6 +5,3 @@
 	amd64_set_gsbase.c
 
 MDASM=	vfork.S cerror.S getcontext.S
-
-# Don't generate default code for these syscalls:
-NOASM+=	vfork.o
diff --git a/lib/libc/riscv/sys/Makefile.inc b/lib/libc/riscv/sys/Makefile.inc
--- a/lib/libc/riscv/sys/Makefile.inc
+++ b/lib/libc/riscv/sys/Makefile.inc
@@ -4,6 +4,3 @@
 MDASM=	cerror.S \
 	syscall.S \
 	vfork.S
-
-# Don't generate default code for these syscalls:
-NOASM+=	vfork.o