diff --git a/model/django/django.go b/model/django/django.go
index d1f984d..c3ec475 100644
--- a/model/django/django.go
+++ b/model/django/django.go
@@ -25,7 +25,7 @@ func (db *Builder) QueryString() string {
 }
 
 func (db *Builder) Eq(field Field, value interface{}) *Builder {
-	db.Params = append(db.Params, fmt.Sprintf("%__eq=%v", field, value))
+	db.Params = append(db.Params, fmt.Sprintf("%s__eq=%v", field, value))
 	return db
 }