diff --git a/doc/Jamfile.v2 b/doc/Jamfile.v2
index 9b38d99..604371d 100644
--- a/doc/Jamfile.v2
+++ b/doc/Jamfile.v2
@@ -53,3 +53,8 @@ boostbook standalone
 
     ;
 
+###############################################################################
+alias boostdoc ;
+explicit boostdoc ;
+alias boostrelease : standalone ;
+explicit boostrelease ;
diff --git a/include/boost/icl/interval_bounds.hpp b/include/boost/icl/interval_bounds.hpp
index edf16d0..f917cb6 100644
--- a/include/boost/icl/interval_bounds.hpp
+++ b/include/boost/icl/interval_bounds.hpp
@@ -41,8 +41,8 @@ class interval_bounds
     interval_bounds all  ()const { return interval_bounds(_bits & _all  ); }
     interval_bounds left ()const { return interval_bounds(_bits & _left ); }
     interval_bounds right()const { return interval_bounds(_bits & _right); }
-    interval_bounds reverse_left ()const { return interval_bounds((~_bits>>1) & _right); }
-    interval_bounds reverse_right()const { return interval_bounds((~_bits<<1) & _left ); }
+    interval_bounds reverse_left ()const { return interval_bounds((bound_type(~_bits)>>1) & _right); }
+    interval_bounds reverse_right()const { return interval_bounds((bound_type(~_bits)<<1) & _left ); }
 
     bound_type bits()const{ return _bits; }