diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
index a79ccc022357..54287bce7fdc 100644
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -38,10 +38,11 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20180206: remove gdbtui
+OLD_FILES+=usr/bin/gdbtui
 # 20180201: Obsolete forth files
 OLD_FILES+=boot/efi.4th
 OLD_FILES+=boot/pcibios.4th
-
 # 20180114: new clang import which bumps version from 5.0.1 to 6.0.0.
 OLD_FILES+=usr/lib/clang/5.0.1/include/sanitizer/allocator_interface.h
 OLD_FILES+=usr/lib/clang/5.0.1/include/sanitizer/asan_interface.h
diff --git a/gnu/usr.bin/gdb/Makefile b/gnu/usr.bin/gdb/Makefile
index 7598a196300a..c9564c232a3c 100644
--- a/gnu/usr.bin/gdb/Makefile
+++ b/gnu/usr.bin/gdb/Makefile
@@ -5,8 +5,6 @@
 SUBDIR=	libgdb gdb kgdb
 
 .if ${MK_GDB_LIBEXEC} == "no"
-SUBDIR+= gdbtui
-
 .if exists(${.CURDIR}/gdbserver/reg-${MACHINE_CPUARCH}.c)
 SUBDIR+=gdbserver
 .endif
diff --git a/gnu/usr.bin/gdb/gdbtui/Makefile b/gnu/usr.bin/gdb/gdbtui/Makefile
deleted file mode 100644
index 7912d04ec9fa..000000000000
--- a/gnu/usr.bin/gdb/gdbtui/Makefile
+++ /dev/null
@@ -1,19 +0,0 @@
-# $FreeBSD$
-
-PROG=	gdbtui${GDB_SUFFIX}
-SRCS=	tui-main.c
-MAN=
-
-BULIBS= ${OBJ_BU}/libbfd/libbfd.a ${OBJ_BU}/libopcodes/libopcodes.a \
-	${OBJ_BU}/libiberty/libiberty.a
-GDBLIBS= ${OBJ_GDB}/libgdb/libgdb.a
-
-# libthread_db.so calls back into gdb for the proc services.  Make all the
-# global symbols visible.
-LDFLAGS+= -Wl,-E
-
-DPADD=	${GDBLIBS} ${BULIBS}
-LDADD=	${GDBLIBS} ${BULIBS}
-LIBADD+=	m readline ncursesw gnuregex
-
-.include <bsd.prog.mk>
diff --git a/gnu/usr.bin/gdb/gdbtui/Makefile.depend b/gnu/usr.bin/gdb/gdbtui/Makefile.depend
deleted file mode 100644
index ee6269e741a7..000000000000
--- a/gnu/usr.bin/gdb/gdbtui/Makefile.depend
+++ /dev/null
@@ -1,25 +0,0 @@
-# $FreeBSD$
-# Autogenerated - do NOT edit!
-
-DIRDEPS = \
-	gnu/lib/csu \
-	gnu/lib/libreadline/readline \
-	gnu/lib/libregex \
-	gnu/usr.bin/binutils/libbfd \
-	gnu/usr.bin/binutils/libiberty \
-	gnu/usr.bin/binutils/libopcodes \
-	gnu/usr.bin/gdb/libgdb \
-	include \
-	include/xlocale \
-	lib/${CSU_DIR} \
-	lib/libc \
-	lib/libcompiler_rt \
-	lib/msun \
-	lib/ncurses/ncursesw \
-
-
-.include <dirdeps.mk>
-
-.if ${DEP_RELDIR} == ${_DEP_RELDIR}
-# local dependencies - needed for -jN in clean tree
-.endif
diff --git a/targets/pseudo/userland/gnu/Makefile.depend b/targets/pseudo/userland/gnu/Makefile.depend
index e42e2d628b32..b67e02d6ab03 100644
--- a/targets/pseudo/userland/gnu/Makefile.depend
+++ b/targets/pseudo/userland/gnu/Makefile.depend
@@ -32,7 +32,6 @@ DIRDEPS = \
 	gnu/usr.bin/gdb/doc \
 	gnu/usr.bin/gdb/gdb \
 	gnu/usr.bin/gdb/gdbserver \
-	gnu/usr.bin/gdb/gdbtui \
 	gnu/usr.bin/gdb/kgdb \
 	gnu/usr.bin/gdb/libgdb \
 	gnu/usr.bin/gperf \
diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
index e4e56f28202a..e1ef3d30a0cb 100644
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -2460,7 +2460,6 @@ OLD_FILES+=usr/share/man/man1/gcov.1.gz
 .if ${MK_GDB} == no || ${MK_GDB_LIBEXEC} == yes
 OLD_FILES+=usr/bin/gdb
 OLD_FILES+=usr/bin/gdbserver
-OLD_FILES+=usr/bin/gdbtui
 OLD_FILES+=usr/bin/kgdb
 OLD_FILES+=usr/share/man/man1/gdb.1.gz
 OLD_FILES+=usr/share/man/man1/gdbserver.1.gz