diff --git boost/chrono/io/duration_get.hpp boost/chrono/io/duration_get.hpp
index 6014603..938cb73 100644
--- boost/chrono/io/duration_get.hpp
+++ boost/chrono/io/duration_get.hpp
@@ -467,7 +467,7 @@ namespace boost
        * translation in other contexts, as e.g. days and weeks.
        *
        * @param facet the duration_units facet
-       * @param s start input stream iterator.
+       * @param i start input stream iterator.
        * @param e end input stream iterator.
        * @param ios a reference to a ios_base.
        * @param err the ios_base state.
@@ -484,6 +484,10 @@ namespace boost
         const string_type* k = chrono_detail::scan_keyword(i, e, units, units_end,
         //~ std::use_facet<std::ctype<CharT> >(loc),
             err);
+        if (err & (std::ios_base::badbit | std::ios_base::failbit))
+        {
+          return i;
+        }
         if (!facet.match_n_d_valid_unit(k))
         {
           err |= std::ios_base::failbit;
@@ -499,7 +503,7 @@ namespace boost
        * translation in other contexts, as e.g. days and weeks.
        *
        * @param facet the duration_units facet
-       * @param s start input stream iterator.
+       * @param i start input stream iterator.
        * @param e end input stream iterator.
        * @param ios a reference to a ios_base.
        * @param err the ios_base state.
@@ -519,7 +523,10 @@ namespace boost
         const string_type* k = chrono_detail::scan_keyword(i, e, units, units_end,
         //~ std::use_facet<std::ctype<CharT> >(loc),
             err);
-
+        if (err & (std::ios_base::badbit | std::ios_base::failbit))
+        {
+          return i;
+        }
         if (!facet.match_valid_unit(k, rt))
         {
           err |= std::ios_base::failbit;