diff --git a/lib/rb/ext/binary_protocol_accelerated.c b/lib/rb/ext/binary_protocol_accelerated.c
index bb4f4a3..45f5a52 100644
--- a/lib/rb/ext/binary_protocol_accelerated.c
+++ b/lib/rb/ext/binary_protocol_accelerated.c
@@ -103,7 +103,7 @@
     write_i32_direct(trans, FIX2INT(seqid));
   } else {
     write_string_direct(trans, name);
-    write_byte_direct(trans, type);
+    write_byte_direct(trans, FIX2INT(type));
     write_i32_direct(trans, FIX2INT(seqid));
   }