diff --git a/libbb/Makefile b/libbb/Makefile
index 98b144c..3363986 100644
--- a/libbb/Makefile
+++ b/libbb/Makefile
@@ -12,6 +12,12 @@
 endif
 srcdir=$(top_srcdir)/libbb
 LIBBB_DIR:=./
+
+# Ensure "all" is still the default target when make is run by itself in
+# libbb, even if the files we include define rules for targets.
+
+all:
+
 include $(top_srcdir)/Rules.mak
 include $(top_builddir)/.config
 include Makefile.in