diff --git a/include/camera/IProCameraCallbacks.h b/include/camera/IProCameraCallbacks.h
index 563ec17..c774698 100644
--- a/include/camera/IProCameraCallbacks.h
+++ b/include/camera/IProCameraCallbacks.h
@@ -30,6 +30,9 @@
 
 class IProCameraCallbacks : public IInterface
 {
+    /**
+     * Keep up-to-date with IProCameraCallbacks.aidl in frameworks/base
+     */
 public:
     DECLARE_META_INTERFACE(ProCameraCallbacks);