--- a/tools/Makefile
+++ b/tools/Makefile
@@ -21,6 +21,7 @@ ifneq ($(CONFIG_SDK)$(CONFIG_PACKAGE_kmo
   BUILD_B43_TOOLS = y
 endif
 
+tools-y += ar-tool
 tools-y += autoconf autoconf-archive automake bc bison cmake dosfstools
 tools-y += e2fsprogs fakeroot findutils firmware-utils flex gengetopt
 tools-y += libressl libtool lzma m4 make-ext4fs missing-macros mkimage