diff --git a/lib/dpx/dpx.hh b/lib/dpx/dpx.hh
index 02ae833..5639aaa 100644
--- a/lib/dpx/dpx.hh
+++ b/lib/dpx/dpx.hh
@@ -297,7 +297,7 @@ struct dpx {
compliance_e current_compliance;
endian_mode_e current_endian_mode;
- std::istream::streampos header_start;
+ std::streampos header_start;
public:
virtual ~dpx();