diff --git a/auto.sh b/auto.sh
index e0e7135..570dea3 100755
--- a/auto.sh
+++ b/auto.sh
@@ -40,6 +40,13 @@ if [ ! -f "lib/pcre/configure" ]; then
     cd ../..
 fi
 
+### ZLIB reconf
+if [ ! -f "lib/zlib-ng/configure" ]; then
+    cd lib/zlib-ng
+    ./configure
+    cd ../..
+fi
+
 ### ZLIB reconf
 #if [ "$BITCHK" = 64 ]; then
 #    if [ ! -f "lib/zlib/Makefile" ]; then