Index: detail/restrict_impl.hpp
===================================================================
--- detail/restrict_impl.hpp	(revision 65441)
+++ detail/restrict_impl.hpp	(working copy)
@@ -191,7 +191,7 @@
         }
         if (next < beg_ || (end_ != -1 && next >= end_))
             boost::throw_exception(bad_seek());
-        pos_ = this->component().seek(dev, next, BOOST_IOS::cur);
+        pos_ = this->component().seek(dev, next - pos_, BOOST_IOS::cur);
         return offset_to_position(pos_ - beg_);
     }