diff --git a/gdb/mgodb/bson.go b/gdb/mgodb/bson.go
index 8ee130d..35cc0d7 100644
--- a/gdb/mgodb/bson.go
+++ b/gdb/mgodb/bson.go
@@ -24,4 +24,4 @@ type D = bson.D
 // bson.A{"bar", "world", 3.14159, bson.D{{"qux", 12345}}}
 type A = bson.A
 
-type ObjectId = primitive.ObjectID
+type ObjectID = primitive.ObjectID