diff -urpN uClibc-0.9.33.2.orig/extra/config/conf.c uClibc-0.9.33.2/extra/config/conf.c
--- uClibc-0.9.33.2.orig/extra/config/conf.c	2017-02-04 12:57:38.488808014 -0800
+++ uClibc-0.9.33.2/extra/config/conf.c	2017-02-04 20:26:28.613244457 -0800
@@ -435,6 +435,7 @@ int main(int ac, char **av)
 	const char *name;
 	const char *configname = conf_get_configname();
 	struct stat tmpstat;
+	int olddefconfig = 0;
 
 	setlocale(LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
@@ -451,6 +452,7 @@ int main(int ac, char **av)
 			break;
 		case 'd':
 			input_mode = set_default;
+			olddefconfig = 1;
 			break;
 		case 'D':
 			input_mode = set_default;
@@ -514,7 +516,7 @@ int main(int ac, char **av)
 	switch (input_mode) {
 	case set_default:
 		if (!defconfig_file)
-			defconfig_file = conf_get_default_confname();
+			defconfig_file = olddefconfig ? NULL : conf_get_default_confname();
 		if (conf_read(defconfig_file)) {
 			printf(_("***\n"
 				"*** Can't find default configuration \"%s\"!\n"
diff -urpN uClibc-0.9.33.2.orig/Makefile.in uClibc-0.9.33.2/Makefile.in
--- uClibc-0.9.33.2.orig/Makefile.in	2017-02-04 12:57:38.484807980 -0800
+++ uClibc-0.9.33.2/Makefile.in	2017-02-04 12:59:34.625789324 -0800
@@ -460,6 +460,9 @@ allyesconfig: $(conf)
 allnoconfig: $(conf)
 	$(Q)$< -n extra/Configs/Config.in
 
+olddefconfig: $(conf)
+	$(Q)$< -d extra/Configs/Config.in
+
 defconfig: $(conf)
 	$(Q)$< -D extra/Configs/defconfigs/$(ARCH)/$@ extra/Configs/Config.in