diff --git a/include/mapnik/csv/csv_grammar.hpp b/include/mapnik/csv/csv_grammar.hpp
index 723b0405b..240f11ce1 100644
--- a/include/mapnik/csv/csv_grammar.hpp
+++ b/include/mapnik/csv/csv_grammar.hpp
@@ -65,36 +65,7 @@ struct csv_white_space_skipper : qi::primitive_parser<csv_white_space_skipper>
 template <typename Iterator, typename Skipper = csv_white_space_skipper>
 struct csv_line_grammar : qi::grammar<Iterator, csv_line(char, char), Skipper>
 {
-    csv_line_grammar()
-        : csv_line_grammar::base_type(line)
-    {
-        qi::_r1_type _r1;
-        qi::_r2_type _r2;
-        qi::lit_type lit;
-        qi::char_type char_;
-        unesc_char.add
-            ("\\a", '\a')
-            ("\\b", '\b')
-            ("\\f", '\f')
-            ("\\n", '\n')
-            ("\\r", '\r')
-            ("\\t", '\t')
-            ("\\v", '\v')
-            ("\\\\",'\\')
-            ("\\\'", '\'')
-            ("\\\"", '\"')
-            ("\"\"", '\"') // double quote
-            ;
-        line = -lit("\r") > -lit("\n") > column(_r1, _r2) % lit(_r1)
-            ;
-        column = quoted(_r2) | *(char_ - lit(_r1))
-            ;
-        quoted = lit(_r1) > text(_r1) > lit(_r1) // support unmatched quotes or not (??)
-            ;
-        text = *(unesc_char | (char_ - lit(_r1)))
-            ;
-        BOOST_SPIRIT_DEBUG_NODES((line)(column)(quoted));
-    }
+    csv_line_grammar();
 private:
     qi::rule<Iterator, csv_line(char, char),  Skipper> line;
     qi::rule<Iterator, csv_value(char, char)> column; // no-skip
diff --git a/include/mapnik/csv/csv_grammar_impl.hpp b/include/mapnik/csv/csv_grammar_impl.hpp
new file mode 100644
index 000000000..560835443
--- /dev/null
+++ b/include/mapnik/csv/csv_grammar_impl.hpp
@@ -0,0 +1,61 @@
+/*****************************************************************************
+ *
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2016 Artem Pavlenko
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *****************************************************************************/
+
+#include <mapnik/csv/csv_grammar.hpp>
+
+namespace mapnik {
+
+namespace qi = boost::spirit::qi;
+
+template <typename Iterator, typename Skipper>
+csv_line_grammar<Iterator, Skipper>::csv_line_grammar()
+    : csv_line_grammar::base_type(line)
+{
+    qi::_r1_type _r1;
+    qi::_r2_type _r2;
+    qi::lit_type lit;
+    qi::char_type char_;
+    unesc_char.add
+        ("\\a", '\a')
+        ("\\b", '\b')
+        ("\\f", '\f')
+        ("\\n", '\n')
+        ("\\r", '\r')
+        ("\\t", '\t')
+        ("\\v", '\v')
+        ("\\\\",'\\')
+        ("\\\'", '\'')
+        ("\\\"", '\"')
+        ("\"\"", '\"') // double quote
+        ;
+    line = -lit("\r") > -lit("\n") > column(_r1, _r2) % lit(_r1)
+        ;
+    column = quoted(_r2) | *(char_ - lit(_r1))
+        ;
+    quoted = lit(_r1) > text(_r1) > lit(_r1) // support unmatched quotes or not (??)
+        ;
+    text = *(unesc_char | (char_ - lit(_r1)))
+        ;
+    BOOST_SPIRIT_DEBUG_NODES((line)(column)(quoted));
+}
+
+} // namespace mapnik
diff --git a/plugins/input/csv/csv_utils.cpp b/plugins/input/csv/csv_utils.cpp
index 69a3bb836..2f8a84a7b 100644
--- a/plugins/input/csv/csv_utils.cpp
+++ b/plugins/input/csv/csv_utils.cpp
@@ -27,9 +27,11 @@
 #include <mapnik/wkt/wkt_factory.hpp>
 #include <mapnik/json/geometry_parser.hpp>
 #include <mapnik/util/conversions.hpp>
-#include <mapnik/csv/csv_grammar.hpp>
 #include <mapnik/util/trim.hpp>
 #include <mapnik/datasource.hpp>
+// csv grammar
+#include <mapnik/csv/csv_grammar_impl.hpp>
+//
 #include "csv_getline.hpp"
 #include "csv_utils.hpp"