diff --git a/keymaster/aidl/Android.bp b/keymaster/aidl/Android.bp
index a2d73ead..3011da6 100644
--- a/keymaster/aidl/Android.bp
+++ b/keymaster/aidl/Android.bp
@@ -15,4 +15,5 @@
             },
         },
     },
+    versions: ["1"],
 }