diff --git a/include/boost/array.hpp b/include/boost/array.hpp
index 4c5c82c..2ecd800 100644
--- a/include/boost/array.hpp
+++ b/include/boost/array.hpp
@@ -247,14 +247,14 @@ namespace boost {
             return failed_rangecheck();
         }
 
-        BOOST_CONSTEXPR const_reference operator[](size_type /*i*/) const
+        const_reference operator[](size_type /*i*/) const
         {
             return failed_rangecheck();
         }
 
         // at() with range check
-        reference at(size_type /*i*/)               {   return failed_rangecheck(); }
-        BOOST_CONSTEXPR const_reference at(size_type /*i*/) const   { return failed_rangecheck(); }
+        reference at(size_type /*i*/)               { return failed_rangecheck(); }
+        const_reference at(size_type /*i*/) const   { return failed_rangecheck(); }
 
         // front() and back()
         reference front()
@@ -262,7 +262,7 @@ namespace boost {
             return failed_rangecheck();
         }
 
-        BOOST_CONSTEXPR const_reference front() const
+        const_reference front() const
         {
             return failed_rangecheck();
         }
@@ -272,7 +272,7 @@ namespace boost {
             return failed_rangecheck();
         }
 
-        BOOST_CONSTEXPR const_reference back() const
+        const_reference back() const
         {
             return failed_rangecheck();
         }