diff --git a/services/java/com/android/server/am/ActivityStack.java b/services/java/com/android/server/am/ActivityStack.java
index b9d3d76bbd11f..1aed7fe0a1d88 100644
--- a/services/java/com/android/server/am/ActivityStack.java
+++ b/services/java/com/android/server/am/ActivityStack.java
@@ -2067,7 +2067,7 @@ final class ActivityStack {
      * task starting at a specified index.
      */
     private final void performClearTaskAtIndexLocked(int taskId, int i) {
-        while (i < (mHistory.size()-1)) {
+        while (i < mHistory.size()) {
             ActivityRecord r = mHistory.get(i);
             if (r.task.taskId != taskId) {
                 // Whoops hit the end.