diff --git a/cde/lib/tt/lib/util/tt_xdr_utils.h b/cde/lib/tt/lib/util/tt_xdr_utils.h
index b450564fe..b61b7f140 100644
--- a/cde/lib/tt/lib/util/tt_xdr_utils.h
+++ b/cde/lib/tt/lib/util/tt_xdr_utils.h
@@ -55,7 +55,11 @@ class _Tt_xdr_size_stream : public _Tt_allocated {
 #ifdef __DECCXX
         XDR::xdr_ops ops;
 #else
+# if defined(sun)
 	struct xdr_ops ops;
+# else
+	struct XDR::xdr_ops ops;
+# endif
 #endif
 };