diff --git a/lib/zlib/deflate.js b/lib/zlib/deflate.js
index 2fca402..a0df5ba 100644
--- a/lib/zlib/deflate.js
+++ b/lib/zlib/deflate.js
@@ -1666,9 +1666,10 @@ const deflate = (strm, flush) => {
    */
   if (strm.avail_in !== 0 || s.lookahead !== 0 ||
     (flush !== Z_NO_FLUSH && s.status !== FINISH_STATE)) {
-    let bstate = (s.strategy === Z_HUFFMAN_ONLY) ? deflate_huff(s, flush) :
-      (s.strategy === Z_RLE ? deflate_rle(s, flush) :
-        configuration_table[s.level].func(s, flush));
+    let bstate = s.level === 0 ? deflate_stored(s, flush) :
+                 s.strategy === Z_HUFFMAN_ONLY ? deflate_huff(s, flush) :
+                 s.strategy === Z_RLE ? deflate_rle(s, flush) :
+                 configuration_table[s.level].func(s, flush);
 
     if (bstate === BS_FINISH_STARTED || bstate === BS_FINISH_DONE) {
       s.status = FINISH_STATE;