diff --git a/include/mapnik/expression_grammar.hpp b/include/mapnik/expression_grammar.hpp
index 7a71976a7..5bb132f05 100644
--- a/include/mapnik/expression_grammar.hpp
+++ b/include/mapnik/expression_grammar.hpp
@@ -36,6 +36,7 @@
 #pragma GCC diagnostic ignored "-Wunused-local-typedef"
 #pragma GCC diagnostic ignored "-Wshadow"
 #pragma GCC diagnostic ignored "-Wsign-conversion"
+#pragma GCC diagnostic ignored "-Wsign-compare"
 #pragma GCC diagnostic ignored "-Wconversion"
 #include <boost/spirit/include/qi.hpp>
 #include <boost/spirit/include/support_locals.hpp>
diff --git a/include/mapnik/expression_grammar_impl.hpp b/include/mapnik/expression_grammar_impl.hpp
index d123b3bae..93b6d868e 100644
--- a/include/mapnik/expression_grammar_impl.hpp
+++ b/include/mapnik/expression_grammar_impl.hpp
@@ -31,9 +31,17 @@
 #include <mapnik/function_call.hpp>
 
 // boost
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#pragma GCC diagnostic ignored "-Wunused-local-typedef"
+#pragma GCC diagnostic ignored "-Wshadow"
+#pragma GCC diagnostic ignored "-Wsign-conversion"
+#pragma GCC diagnostic ignored "-Wsign-compare"
+#pragma GCC diagnostic ignored "-Wconversion"
 #include <boost/spirit/include/qi.hpp>
 #include <boost/spirit/include/phoenix_operator.hpp>
 #include <boost/spirit/include/phoenix_object.hpp>
+#pragma GCC diagnostic pop
 
 // fwd declare
 namespace mapnik {