diff --git a/lib/isc/unix/include/isc/Makefile.in b/lib/isc/unix/include/isc/Makefile.in
index b73a5498b2..da8088b450 100644
--- a/lib/isc/unix/include/isc/Makefile.in
+++ b/lib/isc/unix/include/isc/Makefile.in
@@ -39,5 +39,5 @@ install:: installdirs
 		${INSTALL_DATA} $(srcdir)/$$i ${includedir}/isc ; \
 	done
 
-clean distclean::
+distclean::
 	rm -f net.h