diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64
--- a/sys/conf/files.amd64
+++ b/sys/conf/files.amd64
@@ -69,7 +69,8 @@
 amd64/amd64/db_trace.c		optional	ddb
 amd64/amd64/efirt_machdep.c	optional	efirt
 amd64/amd64/efirt_support.S	optional	efirt
-amd64/amd64/elf_machdep.c	standard
+amd64/amd64/elf_machdep.c	standard \
+	dependency "elf-vdso.so.o"
 amd64/amd64/exception.S		standard
 amd64/amd64/exec_machdep.c	standard
 amd64/amd64/fpu.c		standard
@@ -386,17 +387,21 @@
 dev/p2sb/lewisburg_gpio.c	optional	lbggpio lbggpiocm
 isa/syscons_isa.c		optional	sc
 isa/vga_isa.c			optional	vga
-kern/imgact_aout.c		optional compat_aout
+kern/imgact_aout.c		optional compat_aout \
+	dependency "elf-vdso32.so.o"
 kern/link_elf_obj.c		standard
 #
 # IA32 binary support
 #
 #amd64/ia32/ia32_exception.S	optional	compat_freebsd32
 amd64/ia32/ia32_reg.c		optional	compat_freebsd32
-amd64/ia32/ia32_signal.c	optional	compat_freebsd32
-amd64/ia32/ia32_syscall.c	optional	compat_freebsd32
+amd64/ia32/ia32_signal.c	optional	compat_freebsd32 \
+	dependency "elf-vdso32.so.o"
+amd64/ia32/ia32_syscall.c	optional	compat_freebsd32 \
+	dependency "elf-vdso32.so.o"
 amd64/ia32/ia32_misc.c		optional	compat_freebsd32
-compat/ia32/ia32_sysvec.c	optional	compat_freebsd32
+compat/ia32/ia32_sysvec.c	optional	compat_freebsd32 \
+	dependency "elf-vdso32.so.o"
 #
 # x86 real mode BIOS emulator, required by dpms/pci/vesa
 #