Index: libs/program_options/test/options_description_test.cpp
===================================================================
--- libs/program_options/test/options_description_test.cpp	(Revision 57510)
+++ libs/program_options/test/options_description_test.cpp	(Arbeitskopie)
@@ -93,11 +93,39 @@
 
 }
 
+void test_word_wrapping()
+{
+   options_description desc("Supported options");
+   desc.add_options()
+      ("help",    "this is a sufficiently long text to require word-wrapping")
+      ("prefix", value<string>()->default_value("/h/proj/tmp/dispatch"), "root path of the dispatch installation")
+      ("opt1",    "this_is_a_sufficiently_long_text_to_require_word-wrapping_but_cannot_be_wrapped")
+      ("opt2",    "this_is_a_sufficiently long_text_to_require_word-wrapping")
+      ("opt3",    "this_is_a sufficiently_long_text_to_require_word-wrapping_but_will_not_be_wrapped")
+      ;
+    stringstream ss;
+    ss << desc;    
+    BOOST_CHECK_EQUAL(ss.str(),
+"Supported options:\n"
+"  --help                               this is a sufficiently long text to \n"
+"                                       require word-wrapping\n"
+"  --prefix arg (=/h/proj/tmp/dispatch) root path of the dispatch installation\n"
+"  --opt1                               this_is_a_sufficiently_long_text_to_requ\n"
+"                                       ire_word-wrapping_but_cannot_be_wrapped\n"
+"  --opt2                               this_is_a_sufficiently \n"
+"                                       long_text_to_require_word-wrapping\n"
+"  --opt3                               this_is_a sufficiently_long_text_to_requ\n"
+"                                       ire_word-wrapping_but_will_not_be_wrappe\n"
+"                                       d\n"
+   );
+}
+
 int main(int, char* [])
 {
     test_type();
     test_approximation();
     test_formatting();
     test_long_default_value();
+    test_word_wrapping();
     return 0;
 }
Index: libs/program_options/src/options_description.cpp
===================================================================
--- libs/program_options/src/options_description.cpp	(Revision 57510)
+++ libs/program_options/src/options_description.cpp	(Arbeitskopie)
@@ -410,8 +410,8 @@
                         {                 
                             // is last_space within the second half ot the 
                             // current line
-                            if ((unsigned)distance(last_space, line_end) < 
-                                (line_length - indent) / 2)
+                            if (static_cast<unsigned>(distance(last_space, line_end)) < 
+                                (line_length / 2))
                             {
                                 line_end = last_space;
                             }