diff --git a/services/core/java/com/android/server/appop/AttributedOp.java b/services/core/java/com/android/server/appop/AttributedOp.java
index cc3efb0..8cf47d0 100644
--- a/services/core/java/com/android/server/appop/AttributedOp.java
+++ b/services/core/java/com/android/server/appop/AttributedOp.java
@@ -651,7 +651,7 @@
 
                 accessEvents.append(makeKey(event.getUidState(), event.getFlags()),
                         new AppOpsManager.NoteOpEvent(event.getStartTime(),
-                                now - event.getStartElapsedTime(),
+                                Math.max(now - event.getStartElapsedTime(), 0),
                                 event.getProxy()));
             }
         }