diff --git a/lib/zlib/inflate.js b/lib/zlib/inflate.js
index e0047c6..8d27936 100644
--- a/lib/zlib/inflate.js
+++ b/lib/zlib/inflate.js
@@ -429,6 +429,9 @@ const inflate = (strm, flush) => {
         }
         //===//
         if ((state.wrap & 2) && hold === 0x8b1f) {  /* gzip header */
+          if (state.wbits === 0) {
+            state.wbits = 15;
+          }
           state.check = 0/*crc32(0L, Z_NULL, 0)*/;
           //=== CRC2(state.check, hold);
           hbuf[0] = hold & 0xff;