--- lib/new_filter.cpp
+++ lib/new_filter.cpp
@@ -458,11 +458,23 @@
       module->file.assign(option_file.str(), slash + 1 - option_file.str());
       //module->file += "lib";
       module->file += filter_name;
-      module->file += "-filter.so";
+      module->file += "-filter."
+#ifdef __APPLE_CC__
+		  "bundle"
+#else
+		  "so"
+#endif
+		  ;
     } else {
       if (module->file[0] != '/')
         module->file.insert(0, option_file.str(), slash + 1 - option_file.str());
-      module->file += ".so";
+      module->file += "."
+#ifdef __APPLE_CC__
+		  "bundle"
+#else
+		  "so"
+#endif
+		  ;
     }
 
     return module.release();