diff --git a/gnu/dist/toolchain/gdb/config/vax/nbsd.mh b/gnu/dist/toolchain/gdb/config/vax/nbsd.mh
index 70bc4d757e64..c5ae7fbc4d8d 100644
--- a/gnu/dist/toolchain/gdb/config/vax/nbsd.mh
+++ b/gnu/dist/toolchain/gdb/config/vax/nbsd.mh
@@ -1,5 +1,5 @@
 # Host: DEC VAX running NetBSD
-XDEPFILES=
+XDEPFILES= ser-tcp.o
 NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o vaxnbsd-nat.o solib.o
 XM_FILE= xm-nbsd.h
 NAT_FILE= nm-nbsd.h