diff --git a/bindings/python/mapnik/__init__.py b/bindings/python/mapnik/__init__.py
index b0afbcf3c..03681eabc 100644
--- a/bindings/python/mapnik/__init__.py
+++ b/bindings/python/mapnik/__init__.py
@@ -1030,7 +1030,7 @@ def register_plugins(path=None):
             path = inputpluginspath
     DatasourceCache.register_datasources(path)
 
-def register_fonts(path=None,valid_extensions=['.ttf','.otf','.ttc','.pfa','.pfb','.ttc','.dfont']):
+def register_fonts(path=None,valid_extensions=['.ttf','.otf','.ttc','.pfa','.pfb','.ttc','.dfont','.woff']):
     """Recursively register fonts using path argument as base directory"""
     if not path:
        if os.environ.has_key('MAPNIK_FONT_DIRECTORY'):
diff --git a/src/font_engine_freetype.cpp b/src/font_engine_freetype.cpp
index 9e368d9f4..b6581c56b 100644
--- a/src/font_engine_freetype.cpp
+++ b/src/font_engine_freetype.cpp
@@ -83,6 +83,7 @@ bool freetype_engine::is_font_file(std::string const& file_name)
         boost::algorithm::ends_with(fn,std::string(".pfa")) ||
         boost::algorithm::ends_with(fn,std::string(".pfb")) ||
         boost::algorithm::ends_with(fn,std::string(".ttc")) ||
+        boost::algorithm::ends_with(fn,std::string(".woff"))||
         // Plus OSX custom ext
         boost::algorithm::ends_with(fn,std::string(".dfont"));
 }