diff --git a/lib/dns/Makefile.in b/lib/dns/Makefile.in
index 8e2e509eb7..9060ac0c95 100644
--- a/lib/dns/Makefile.in
+++ b/lib/dns/Makefile.in
@@ -37,5 +37,5 @@ installdirs:
 install:: timestamp installdirs
 	${INSTALL_DATA} libdns.a ${libdir}
 
-clean::
+clean distclean::
 	rm -f libdns.a timestamp
diff --git a/lib/isc/Makefile.in b/lib/isc/Makefile.in
index 312df80ef3..04872d5b65 100644
--- a/lib/isc/Makefile.in
+++ b/lib/isc/Makefile.in
@@ -39,5 +39,5 @@ installdirs:
 install:: timestamp installdirs
 	${INSTALL_DATA} libisc.a ${libdir}
 
-clean::
+clean distclean::
 	rm -f libisc.a timestamp