diff --git a/bindings/python/mapnik_symbolizer.cpp b/bindings/python/mapnik_symbolizer.cpp
index 4e893f32a..fa4f4b61c 100644
--- a/bindings/python/mapnik_symbolizer.cpp
+++ b/bindings/python/mapnik_symbolizer.cpp
@@ -172,7 +172,7 @@ void export_symbolizer()
 {
     using namespace boost::python;
 
-    implicitly_convertible<mapnik::value_bool, mapnik::symbolizer_base::value_type>();
+    //implicitly_convertible<mapnik::value_bool, mapnik::symbolizer_base::value_type>();
     implicitly_convertible<mapnik::value_integer, mapnik::symbolizer_base::value_type>();
     implicitly_convertible<mapnik::value_double, mapnik::symbolizer_base::value_type>();
     implicitly_convertible<std::string, mapnik::symbolizer_base::value_type>();