diff --git a/include/boost/concept/detail/concept_def.hpp b/include/boost/concept/detail/concept_def.hpp
old mode 100755
new mode 100644
index 79f628e..750561e
--- a/include/boost/concept/detail/concept_def.hpp
+++ b/include/boost/concept/detail/concept_def.hpp
@@ -15,22 +15,6 @@
 //
 // Also defines an equivalent SomeNameConcept for backward compatibility.
 // Maybe in the next release we can kill off the "Concept" suffix for good.
-#if BOOST_WORKAROUND(__GNUC__, <= 3)
-# define BOOST_concept(name, params)                                            \
-    template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) >       \
-    struct name; /* forward declaration */                                      \
-                                                                                \
-    template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) >       \
-    struct BOOST_PP_CAT(name,Concept)                                           \
-      : name< BOOST_PP_SEQ_ENUM(params) >                                       \
-    {                                                                           \
-        /* at least 2.96 and 3.4.3 both need this */                            \
-        BOOST_PP_CAT(name,Concept)();                                           \
-    };                                                                          \
-                                                                                \
-    template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) >       \
-    struct name                                                                
-#else
 # define BOOST_concept(name, params)                                            \
     template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) >       \
     struct name; /* forward declaration */                                      \
@@ -43,7 +27,6 @@
                                                                                 \
     template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) >       \
     struct name                                                                
-#endif
     
 // Helper for BOOST_concept, above.
 # define BOOST_CONCEPT_typename(r, ignored, index, t) \