diff --git a/http2/hpack/huffman/huffman_spec_tables.h b/http2/hpack/huffman/huffman_spec_tables.h
index 6cd8726..d1b144b 100644
--- a/http2/hpack/huffman/huffman_spec_tables.h
+++ b/http2/hpack/huffman/huffman_spec_tables.h
@@ -18,6 +18,10 @@
   // The encoding of each symbol, right justified (as printed), which means that
   // the last bit of the encoding is the low-order bit of the uint32.
   static const uint32_t kRightCodes[257];
+
+  // The encoding of each symbol, left justified (as printed), which means that
+  // the first bit of the encoding is the high-order bit of the uint32.
+  static const uint32_t kLeftCodes[257];
 };
 
 }  // namespace http2