diff --git a/t/sanity.t b/t/sanity.t
index 7244133..04003b9 100644
--- a/t/sanity.t
+++ b/t/sanity.t
@@ -2,7 +2,7 @@
 
 use t::Config;
 
-plan tests => 211;
+plan tests => 215;
 
 #no_diff();
 
@@ -3700,3 +3700,72 @@ install: all
 clean:
 	rm -rf build
 
+
+
+=== TEST 56: --without-lua_resty_dns
+--- cmd: ./configure --with-lua51 --dry-run --without-lua_resty_dns
+--- out
+platform: linux (linux)
+cp -rp bundle/ build
+cd build
+cd lua-5.1.5
+gmake linux
+gmake install INSTALL_TOP=$OPENRESTY_BUILD_DIR/lua-root/usr/local/openresty/lua
+export LUA_LIB='$OPENRESTY_BUILD_DIR/lua-root/usr/local/openresty/lua/lib'
+export LUA_INC='$OPENRESTY_BUILD_DIR/lua-root/usr/local/openresty/lua/include'
+cd ..
+cd nginx-1.7.2
+./configure --prefix=/usr/local/openresty/nginx \
+  --add-module=../ngx_devel_kit-0.2.19 \
+  --add-module=../echo-nginx-module-0.54 \
+  --add-module=../xss-nginx-module-0.04 \
+  --add-module=../ngx_coolkit-0.2rc1 \
+  --add-module=../set-misc-nginx-module-0.24 \
+  --add-module=../form-input-nginx-module-0.09 \
+  --add-module=../encrypted-session-nginx-module-0.03 \
+  --add-module=../srcache-nginx-module-0.28 \
+  --add-module=../ngx_lua-0.9.10 \
+  --add-module=../ngx_lua_upstream-0.02 \
+  --add-module=../headers-more-nginx-module-0.25 \
+  --add-module=../array-var-nginx-module-0.03 \
+  --add-module=../memc-nginx-module-0.15 \
+  --add-module=../redis2-nginx-module-0.11 \
+  --add-module=../redis-nginx-module-0.3.7 \
+  --add-module=../rds-json-nginx-module-0.13 \
+  --add-module=../rds-csv-nginx-module-0.05 \
+  --with-http_ssl_module
+cd ../..
+Type the following commands to build and install:
+    gmake
+    gmake install
+
+--- makefile
+.PHONY: all install clean
+
+all:
+	cd $OPENRESTY_BUILD_DIR/lua-5.1.5 && $(MAKE) linux
+	cd $OPENRESTY_BUILD_DIR/lua-cjson-2.1.0.1 && $(MAKE) DESTDIR=$(DESTDIR) LUA_INCLUDE_DIR=$OPENRESTY_BUILD_DIR/lua-root/usr/local/openresty/lua/include LUA_CMODULE_DIR=/usr/local/openresty/lualib LUA_MODULE_DIR=/usr/local/openresty/lualib CJSON_CFLAGS="-g -fpic" CC=cc
+	cd $OPENRESTY_BUILD_DIR/lua-redis-parser-0.10 && $(MAKE) DESTDIR=$(DESTDIR) LUA_INCLUDE_DIR=$OPENRESTY_BUILD_DIR/lua-root/usr/local/openresty/lua/include LUA_LIB_DIR=/usr/local/openresty/lualib CC=cc
+	cd $OPENRESTY_BUILD_DIR/lua-rds-parser-0.05 && $(MAKE) DESTDIR=$(DESTDIR) LUA_INCLUDE_DIR=$OPENRESTY_BUILD_DIR/lua-root/usr/local/openresty/lua/include LUA_LIB_DIR=/usr/local/openresty/lualib CC=cc
+	cd $OPENRESTY_BUILD_DIR/nginx-1.7.2 && $(MAKE)
+
+install: all
+	cd $OPENRESTY_BUILD_DIR/lua-5.1.5 && $(MAKE) install INSTALL_TOP=$(DESTDIR)/usr/local/openresty/lua
+	cd $OPENRESTY_BUILD_DIR/lua-cjson-2.1.0.1 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_INCLUDE_DIR=$OPENRESTY_BUILD_DIR/lua-root/usr/local/openresty/lua/include LUA_CMODULE_DIR=/usr/local/openresty/lualib LUA_MODULE_DIR=/usr/local/openresty/lualib CJSON_CFLAGS="-g -fpic" CC=cc
+	cd $OPENRESTY_BUILD_DIR/lua-redis-parser-0.10 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_INCLUDE_DIR=$OPENRESTY_BUILD_DIR/lua-root/usr/local/openresty/lua/include LUA_LIB_DIR=/usr/local/openresty/lualib CC=cc
+	cd $OPENRESTY_BUILD_DIR/lua-rds-parser-0.05 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_INCLUDE_DIR=$OPENRESTY_BUILD_DIR/lua-root/usr/local/openresty/lua/include LUA_LIB_DIR=/usr/local/openresty/lualib CC=cc
+	cd $OPENRESTY_BUILD_DIR/lua-resty-memcached-0.13 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/lua-resty-redis-0.20 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/lua-resty-mysql-0.14 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/lua-resty-string-0.09 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/lua-resty-upload-0.09 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/lua-resty-websocket-0.03 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/lua-resty-lock-0.03 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/lua-resty-lrucache-0.02 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/lua-resty-core-0.0.8 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/lua-resty-upstream-healthcheck-0.02 && $(MAKE) install DESTDIR=$(DESTDIR) LUA_LIB_DIR=/usr/local/openresty/lualib INSTALL=$OPENRESTY_BUILD_DIR/install
+	cd $OPENRESTY_BUILD_DIR/nginx-1.7.2 && $(MAKE) install DESTDIR=$(DESTDIR)
+
+clean:
+	rm -rf build
+
diff --git a/util/configure b/util/configure
index 366963b..e9be2d6 100755
--- a/util/configure
+++ b/util/configure
@@ -171,6 +171,9 @@ for my $opt (@ARGV) {
     } elsif ($opt eq '--without-lua_resty_redis') {
         $resty_opts{no_lua_resty_redis} = 1;
 
+    } elsif ($opt eq '--without-lua_resty_dns') {
+        $resty_opts{no_lua_resty_dns} = 1;
+
     } elsif ($opt eq '--without-lua_resty_mysql') {
         $resty_opts{no_lua_resty_mysql} = 1;