Index: libs/iostreams/src/gzip.cpp
===================================================================
--- libs/iostreams/src/gzip.cpp	(revision 74423)
+++ libs/iostreams/src/gzip.cpp	(working copy)
@@ -62,7 +62,7 @@
     case s_os:
         os_ = value;
         if (flags_ & gzip::flags::extra) {
-            state_ = s_extra;
+            state_ = s_xlen;
         } else if (flags_ & gzip::flags::name) {
             state_ = s_name;
         } else if (flags_ & gzip::flags::comment) {