diff --git a/spec/Vehicle/Vehicle.vspec b/spec/Vehicle/Vehicle.vspec
index 85de298b..37aa5af3 100644
--- a/spec/Vehicle/Vehicle.vspec
+++ b/spec/Vehicle/Vehicle.vspec
@@ -55,6 +55,7 @@ VehicleIdentification.VIN:
   datatype: string
   type: attribute
   description: 17-character Vehicle Identification Number (VIN) as defined by ISO 3779.
+  pattern: ^([0-9A-HJ-NPR-Z]{3})([0-9A-HJ-NPR-Z]{6})([0-9A-HJ-NPR-Z]{4}[0-9]{4})$
 
 VehicleIdentification.WMI:
   datatype: string