diff --git a/core/java/android/content/res/AssetManager.java b/core/java/android/content/res/AssetManager.java
index 289534273d132..4ddaa9b4cdf8b 100644
--- a/core/java/android/content/res/AssetManager.java
+++ b/core/java/android/content/res/AssetManager.java
@@ -1050,8 +1050,11 @@ public final class AssetManager implements AutoCloseable {
             }
         }
 
-        if (mObject != 0) {
-            nativeDestroy(mObject);
+        synchronized (this) {
+            if (mObject != 0) {
+                nativeDestroy(mObject);
+                mObject = 0;
+            }
         }
     }