diff --git a/common.h b/common.h
index 9800ba6..bc081b1 100644
--- a/common.h
+++ b/common.h
@@ -1,3 +1,8 @@
+#define LUAMONGO_NAME           "mongo"
+#define LUAMONGO_NAME_STRING    "_NAME"
+#define LUAMONGO_VERSION        "0.4"
+#define LUAMONGO_VERSION_STRING "_VERSION"
+
 #define LUAMONGO_ROOT            "mongo"
 #define LUAMONGO_CONNECTION      "Connection"
 #define LUAMONGO_REPLICASET      "ReplicaSet"
diff --git a/main.cpp b/main.cpp
index 9ed93b1..95e9865 100644
--- a/main.cpp
+++ b/main.cpp
@@ -85,6 +85,12 @@ LM_EXPORT int luaopen_mongo(lua_State *L) {
      * so "mongo = require('mongo')" works
      */
     // lua_getglobal(L, LUAMONGO_ROOT);
+    
+    // push the version number and module name
+    lua_pushstring(L, LUAMONGO_NAME);
+    lua_setfield(L, -2, LUAMONGO_NAME_STRING);
+    lua_pushstring(L, LUAMONGO_VERSION);
+    lua_setfield(L, -2, LUAMONGO_VERSION_STRING);
 
     return 1;
 }
diff --git a/mongo_cxx_extension.cpp b/mongo_cxx_extension.cpp
index 22b66fe..bda2852 100644
--- a/mongo_cxx_extension.cpp
+++ b/mongo_cxx_extension.cpp
@@ -93,7 +93,7 @@ namespace mongo_cxx_extension {
   }
 
   void GridFileBuilder::appendChunk(const char *data, size_t length) {
-    if (length == 0 || _client == NULL) return;
+    if (length == 0) return;
     // check if there are pending data
     if (_pending_data != NULL) {
       size_t total_size = _pending_data_size + length;
@@ -123,7 +123,6 @@ namespace mongo_cxx_extension {
   
   BSONObj GridFileBuilder::buildFile(const string &name,
                                        const string& content_type) {
-    if (_client == NULL) return BSONObj();
     privateAppendPendingData();
     
     /* from gridfs.cpp at https://github.com/mongodb/mongo-cxx-driver/blob/legacy/src/mongo/client/gridfs.cpp */
@@ -162,9 +161,15 @@ namespace mongo_cxx_extension {
     BSONObj ret = file.obj();
     _client->insert(_filesNS.c_str(), ret);
     
-    // disallow builder object
-    _client = NULL;
-
+    // resets the object
+    _current_chunk     = 0;
+    _pending_data      = NULL;
+    _pending_data_size = 0;
+    _file_length       = 0;
+    OID id;
+    id.init();
+    _file_id = BSON("_id" << id);
+    
     return ret;
   }
   
diff --git a/mongo_gridfilebuilder.cpp b/mongo_gridfilebuilder.cpp
index 7e1a1bb..1132939 100644
--- a/mongo_gridfilebuilder.cpp
+++ b/mongo_gridfilebuilder.cpp
@@ -139,6 +139,7 @@ static int gridfilebuilder_tostring(lua_State *L) {
 int mongo_gridfilebuilder_register(lua_State *L) {
   static const luaL_Reg gridfilebuilder_methods[] = {
     {"append", gridfilebuilder_append},
+    {"write", gridfilebuilder_append},
     {"build", gridfilebuilder_build},
     {NULL, NULL}
   };