diff --git a/bindings/python/mapnik_feature.cpp b/bindings/python/mapnik_feature.cpp
index 97190546f..f6178a6aa 100644
--- a/bindings/python/mapnik_feature.cpp
+++ b/bindings/python/mapnik_feature.cpp
@@ -196,9 +196,9 @@ void export_feature()
     // Python to mapnik::value converters
     // NOTE: order matters here. For example value_null must be listed before
     // bool otherwise Py_None will be interpreted as bool (false)
-    implicitly_convertible<UnicodeString,mapnik::value>();
+    implicitly_convertible<mapnik::value_unicode_string,mapnik::value>();
     implicitly_convertible<mapnik::value_null,mapnik::value>();
-    implicitly_convertible<bool,mapnik::value>();
+    implicitly_convertible<mapnik::value_bool,mapnik::value>();
     implicitly_convertible<mapnik::value_integer,mapnik::value>();
     implicitly_convertible<mapnik::value_double,mapnik::value>();
 
diff --git a/include/mapnik/expression_grammar.hpp b/include/mapnik/expression_grammar.hpp
index 678e9f6ff..a0b3614ec 100644
--- a/include/mapnik/expression_grammar.hpp
+++ b/include/mapnik/expression_grammar.hpp
@@ -121,6 +121,12 @@ struct geometry_types : qi::symbols<char,mapnik::value_integer>
     }
 };
 
+template <typename T>
+struct integer_parser
+{
+    typedef qi::int_parser<T,10,1,-1> type;
+};
+
 template <typename Iterator>
 struct expression_grammar : qi::grammar<Iterator, expr_node(), space_type>
 {
@@ -129,6 +135,7 @@ struct expression_grammar : qi::grammar<Iterator, expr_node(), space_type>
     explicit expression_grammar(mapnik::transcoder const& tr);
 
     qi::real_parser<double, qi::strict_real_policies<double> > strict_double;
+    typename integer_parser<mapnik::value_integer>::type int__;
     boost::phoenix::function<unicode_impl> unicode_;
     boost::phoenix::function<regex_match_impl> regex_match_;
     boost::phoenix::function<regex_replace_impl> regex_replace_;
diff --git a/include/mapnik/json/feature_generator_grammar.hpp b/include/mapnik/json/feature_generator_grammar.hpp
index 432fa9a9c..7968d3716 100644
--- a/include/mapnik/json/feature_generator_grammar.hpp
+++ b/include/mapnik/json/feature_generator_grammar.hpp
@@ -186,8 +186,8 @@ struct feature_generator_grammar:
         using boost::spirit::karma::lit;
         using boost::spirit::karma::uint_;
         using boost::spirit::karma::bool_;
-        using boost::spirit::karma::int_;
-        using boost::spirit::karma::long_long;
+        //using boost::spirit::karma::int_;
+        //using boost::spirit::karma::long_long;
         using boost::spirit::karma::double_;
         using boost::spirit::karma::_val;
         using boost::spirit::karma::_1;
@@ -213,7 +213,7 @@ struct feature_generator_grammar:
             << value(phoenix::at_c<1>(_val))
             ;
 
-        value = (value_null_| bool_ | long_long | double_ | ustring)[_1 = value_base_(_r1)]
+        value = (value_null_| bool_ | int__ | double_ | ustring)[_1 = value_base_(_r1)]
             ;
 
         value_null_ = string[_1 = "null"]
@@ -232,6 +232,7 @@ struct feature_generator_grammar:
     karma::rule<OutputIterator, void(mapnik::value const&)> value;
     karma::rule<OutputIterator, mapnik::value_null()> value_null_;
     karma::rule<OutputIterator, UnicodeString()> ustring;
+    typename karma::int_generator<mapnik::value_integer,10, false> int__;
     // phoenix functions
     phoenix::function<get_id> id_;
     phoenix::function<value_base> value_base_;
diff --git a/include/mapnik/json/feature_grammar.hpp b/include/mapnik/json/feature_grammar.hpp
index 06a4c0311..84175342d 100644
--- a/include/mapnik/json/feature_grammar.hpp
+++ b/include/mapnik/json/feature_grammar.hpp
@@ -111,6 +111,7 @@ struct feature_grammar :
     qi::rule<Iterator,space_type> value;
     qi::symbols<char const, char const> unesc_char;
     qi::uint_parser< unsigned, 16, 4, 4 > hex4 ;
+    qi::int_parser<mapnik::value_integer,10,1,-1> int__;
     qi::rule<Iterator,std::string(), space_type> string_;
     qi::rule<Iterator,space_type> key_value;
     qi::rule<Iterator,boost::variant<value_null,bool,
diff --git a/include/mapnik/value.hpp b/include/mapnik/value.hpp
index 491c3f84e..327723c8d 100644
--- a/include/mapnik/value.hpp
+++ b/include/mapnik/value.hpp
@@ -108,7 +108,8 @@ struct value_null
 };
 
 
-typedef boost::long_long_type value_integer;
+//typedef boost::long_long_type value_integer;
+typedef int value_integer;
 typedef double value_double;
 typedef UnicodeString  value_unicode_string;
 typedef bool value_bool;
@@ -416,7 +417,7 @@ struct add : public boost::static_visitor<V>
 
     value_type operator() (value_bool lhs, value_bool rhs) const
     {
-        return 0LL;
+        return value_integer(lhs + rhs);
     }
 };
 
@@ -454,7 +455,7 @@ struct sub : public boost::static_visitor<V>
 
     value_type operator() (value_bool lhs, value_bool rhs) const
     {
-        return 0LL;
+        return value_integer(lhs - rhs);
     }
 };
 
@@ -491,7 +492,7 @@ struct mult : public boost::static_visitor<V>
 
     value_type operator() (value_bool lhs, value_bool rhs) const
     {
-        return 0LL;
+        return value_integer(0);
     }
 };
 
@@ -599,7 +600,7 @@ struct negate : public boost::static_visitor<V>
 
     value_type operator() (value_bool val) const
     {
-        return val ? -1LL : 0LL;
+        return val ? value_integer(-1) : value_integer(0);
     }
 
     value_type operator() (value_unicode_string const& ustr) const
@@ -783,9 +784,9 @@ struct to_int : public boost::static_visitor<value_integer>
     value_integer operator() (std::string const& val) const
     {
         value_integer result;
-        if (util::string2longlong(val,result))
+        if (util::string2int(val,result))
             return result;
-        return 0LL;
+        return value_integer(0);
     }
 
     value_integer operator() (value_unicode_string const& val) const
@@ -798,7 +799,7 @@ struct to_int : public boost::static_visitor<value_integer>
     value_integer operator() (value_null const& val) const
     {
         boost::ignore_unused_variable_warning(val);
-        return 0LL;
+        return value_integer(0);
     }
 };
 
@@ -886,13 +887,12 @@ public:
 
     value_double to_double() const
     {
-        return 0.0;
-        //return boost::apply_visitor(impl::to_double(),base_);
+        return boost::apply_visitor(impl::to_double(),base_);
     }
 
     value_integer to_int() const
     {
-        return 0LL;
+        return value_integer(0);
         //return boost::apply_visitor(impl::to_int(),base_);
     }
 
diff --git a/plugins/input/shape/dbfile.cpp b/plugins/input/shape/dbfile.cpp
index 5d150064f..c4d7695cf 100644
--- a/plugins/input/shape/dbfile.cpp
+++ b/plugins/input/shape/dbfile.cpp
@@ -173,7 +173,7 @@ void dbf_file::add_attribute(int col, mapnik::transcoder const& tr, Feature & f)
             }
             else
             {
-                mapnik::value_integer val = 0LL;
+                mapnik::value_integer val = 0;
                 const char *itr = record_+fields_[col].offset_;
                 const char *end = itr + fields_[col].length_;
                 if (qi::phrase_parse(itr,end,int_,ascii::space,val))
diff --git a/src/expression_grammar.cpp b/src/expression_grammar.cpp
index 7f1a6e8db..28d9b0444 100644
--- a/src/expression_grammar.cpp
+++ b/src/expression_grammar.cpp
@@ -63,13 +63,12 @@ expression_grammar<Iterator>::expression_grammar(mapnik::transcoder const& tr)
     using qi::lexeme;
     using qi::_val;
     using qi::lit;
-    //using qi::int_;
-    using qi::long_long;
     using qi::double_;
     using qi::hex;
     using qi::omit;
     using standard_wide::char_;
     using standard_wide::no_case;
+
     expr = logical_expr.alias();
 
     logical_expr = not_expr [_val = _1]
@@ -139,7 +138,7 @@ expression_grammar<Iterator>::expression_grammar(mapnik::transcoder const& tr)
         ;
 
     primary_expr = strict_double [_val = _1]
-        | long_long [_val = _1]
+        | int__[_val = _1]
         | no_case[lit("true")] [_val = true]
         | no_case[lit("false")] [_val = false]
         | no_case[lit("null")] [_val = value_null() ]
diff --git a/src/json/feature_grammar.cpp b/src/json/feature_grammar.cpp
index f388d032a..4fca07c59 100644
--- a/src/json/feature_grammar.cpp
+++ b/src/json/feature_grammar.cpp
@@ -90,7 +90,7 @@ feature_grammar<Iterator,FeatureType>::feature_grammar(mapnik::transcoder const&
 #else
     number = strict_double
 #endif
-        //| long_long
+        | int__
         | lit("true") [_val = true]
         | lit ("false") [_val = false]
         | lit("null")[_val = construct<value_null>()]