diff --git a/[SQL]/legacy.sql b/[SQL]/legacy.sql
index 308c608c..b041f32f 100644
--- a/[SQL]/legacy.sql
+++ b/[SQL]/legacy.sql
@@ -821,6 +821,13 @@ ALTER TABLE `licenses`
 ALTER TABLE `owned_vehicles`
   ADD PRIMARY KEY (`plate`);
 
+--
+--
+-- Indexes for table `vehicles`
+--
+ALTER TABLE `vehicles`
+  ADD PRIMARY KEY (`model`);
+
 --
 -- Indexes for table `rented_vehicles`
 --