diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 9aedf1504df50..d526ebc8e5816 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -14831,7 +14831,7 @@ public class ActivityManagerService extends IActivityManager.Stub
                 throw new IllegalArgumentException("null fd");
             }
 
-            synchronized (mProcLock) {
+            synchronized (this) {
                 ProcessRecord proc = findProcessLOSP(process, userId, "dumpHeap");
                 IApplicationThread thread;
                 if (proc == null || (thread = proc.getThread()) == null) {