diff --git a/services/core/java/com/android/server/am/OomAdjuster.java b/services/core/java/com/android/server/am/OomAdjuster.java
index b584ea5b7a25c..b4233d2b148a2 100644
--- a/services/core/java/com/android/server/am/OomAdjuster.java
+++ b/services/core/java/com/android/server/am/OomAdjuster.java
@@ -227,7 +227,8 @@ public final class OomAdjuster {
         final ServiceThread adjusterThread =
                 new ServiceThread(TAG, TOP_APP_PRIORITY_BOOST, false /* allowIo */);
         adjusterThread.start();
-        Process.setThreadGroupAndCpuset(adjusterThread.getThreadId(), THREAD_GROUP_TOP_APP);
+        adjusterThread.getThreadHandler().post(() -> Process.setThreadGroupAndCpuset(
+                adjusterThread.getThreadId(), THREAD_GROUP_TOP_APP));
         return adjusterThread;
     }