diff --git a/libbb/Kbuild b/libbb/Kbuild
index 243626d..7e79310 100644
--- a/libbb/Kbuild
+++ b/libbb/Kbuild
@@ -73,6 +73,7 @@
 lib-y += pidfile.o
 lib-y += platform.o
 lib-y += printable.o
+lib-y += printable_string.o
 lib-y += print_flags.o
 lib-y += process_escape_sequence.o
 lib-y += procps.o