diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ScramblingControl.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ScramblingControl.aidl
index d71d4be9d7..c8834ac7df 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ScramblingControl.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ScramblingControl.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @Backing(type="int") @VintfStability
 enum ScramblingControl {
   UNSCRAMBLED = 0,
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ScramblingMode.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ScramblingMode.aidl
index c73f482585..a0b08c93f1 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ScramblingMode.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/ScramblingMode.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @Backing(type="int") @VintfStability
 enum ScramblingMode {
   RESERVED = 0,
diff --git a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SessionIntent.aidl b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SessionIntent.aidl
index af95f80033..ade3001c27 100644
--- a/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SessionIntent.aidl
+++ b/cas/aidl/aidl_api/android.hardware.cas/current/android/hardware/cas/SessionIntent.aidl
@@ -32,6 +32,7 @@
 // later when a module using the interface is updated, e.g., Mainline modules.
 
 package android.hardware.cas;
+/* @hide */
 @Backing(type="int") @VintfStability
 enum SessionIntent {
   LIVE = 0,
diff --git a/cas/aidl/android/hardware/cas/ScramblingControl.aidl b/cas/aidl/android/hardware/cas/ScramblingControl.aidl
index b36787c348..ba0e439a3b 100644
--- a/cas/aidl/android/hardware/cas/ScramblingControl.aidl
+++ b/cas/aidl/android/hardware/cas/ScramblingControl.aidl
@@ -18,6 +18,7 @@ package android.hardware.cas;
 
 /**
  * Enumerates the keys used to scramble the content.
+ * @hide
  */
 @VintfStability
 @Backing(type="int")
diff --git a/cas/aidl/android/hardware/cas/ScramblingMode.aidl b/cas/aidl/android/hardware/cas/ScramblingMode.aidl
index 2a4858a9c9..dfca8dcce7 100644
--- a/cas/aidl/android/hardware/cas/ScramblingMode.aidl
+++ b/cas/aidl/android/hardware/cas/ScramblingMode.aidl
@@ -18,6 +18,7 @@ package android.hardware.cas;
 
 /**
  * The Scrambling Mode.
+ * @hide
  */
 @VintfStability
 @Backing(type="int")
diff --git a/cas/aidl/android/hardware/cas/SessionIntent.aidl b/cas/aidl/android/hardware/cas/SessionIntent.aidl
index 844deaba29..d7da137039 100644
--- a/cas/aidl/android/hardware/cas/SessionIntent.aidl
+++ b/cas/aidl/android/hardware/cas/SessionIntent.aidl
@@ -18,6 +18,7 @@ package android.hardware.cas;
 
 /**
  * The intented usage for the session.
+ * @hide
  */
 @VintfStability
 @Backing(type="int")