diff --git a/gnu/usr.bin/binutils/libiberty/Makefile b/gnu/usr.bin/binutils/libiberty/Makefile
index 5fd956e9c022..e7279e8fcea7 100644
--- a/gnu/usr.bin/binutils/libiberty/Makefile
+++ b/gnu/usr.bin/binutils/libiberty/Makefile
@@ -10,8 +10,7 @@ SRCS=	argv.c choose-temp.c concat.c cp-demangle.c cplus-dem.c \
 	hex.c floatformat.c lbasename.c objalloc.c obstack.c safe-ctype.c \
 	xatexit.c xexit.c xmalloc.c \
 	xstrdup.c xstrerror.c
-LIBC_BASENAME!=	ar tv /usr/lib/libc.a | grep basename
-.if ${LIBC_BASENAME} == ""
+.if defined(BOOTSTRAPPING)
 SRCS+=	basename.c
 .endif
 CFLAGS+=	-DHAVE_CONFIG_H