diff --git a/include/boost/logic/tribool.hpp b/include/boost/logic/tribool.hpp
index 229feb4..2dfa3be 100644
--- a/include/boost/logic/tribool.hpp
+++ b/include/boost/logic/tribool.hpp
@@ -93,7 +93,7 @@ public:
    *
    * \throws nothrow
    */
-  tribool(bool value) : value(value? true_value : false_value) {}
+  tribool(bool initial_value) : value(initial_value? true_value : false_value) {}
 
   /**
    * Construct a new 3-state boolean value with an indeterminate value.
diff --git a/include/boost/logic/tribool_io.hpp b/include/boost/logic/tribool_io.hpp
index 3a05927..9ee34d4 100644
--- a/include/boost/logic/tribool_io.hpp
+++ b/include/boost/logic/tribool_io.hpp
@@ -140,7 +140,8 @@ public:
   indeterminate_name() : name_(get_default_indeterminate_name<CharT>()) {}
 
   /// Construct the facet with the given name for the indeterminate value
-  explicit indeterminate_name(const string_type& name) : name_(name) {}
+  explicit indeterminate_name(const string_type& initial_name)
+  : name_(initial_name) {}
 
   /// Returns the name for the indeterminate value
   string_type name() const { return name_; }