diff --git a/biometrics/face/1.0/Android.bp b/biometrics/face/1.0/Android.bp
index 61bf247..45dbad9 100644
--- a/biometrics/face/1.0/Android.bp
+++ b/biometrics/face/1.0/Android.bp
@@ -17,6 +17,7 @@
     types: [
         "FaceAcquiredInfo",
         "FaceError",
+        "OptionalBool",
         "OptionalUint64",
         "Status",
         "UserHandle",