diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index 7a709ed59b15e..30749429c4cf8 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -386,6 +386,12 @@ public class Process {
      **/
     public static final int THREAD_GROUP_TOP_APP = 5;
 
+    /**
+     * Thread group for RT app.
+     * @hide
+     **/
+    public static final int THREAD_GROUP_RT_APP = 6;
+
     public static final int SIGNAL_QUIT = 3;
     public static final int SIGNAL_KILL = 9;
     public static final int SIGNAL_USR1 = 10;