diff --git a/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java b/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java
index c9b33aa..c063158 100644
--- a/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java
+++ b/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java
@@ -2523,7 +2523,11 @@
                     changeDisabled = true;
                     needsPermission = false;
                     lowerQuota = allowWhileIdle;
-                    idleOptions = allowWhileIdle ? mOptsWithFgs.toBundle() : null;
+                    idleOptions = (allowWhileIdle || (alarmClock != null))
+                        // This avoids exceptions on existing alarms when the app upgrades to
+                        // target S. Note that FGS from pre-S apps isn't restricted anyway.
+                        ? mOptsWithFgs.toBundle()
+                        : null;
                 }
                 if (needsPermission && !hasScheduleExactAlarmInternal(callingPackage, callingUid)) {
                     if (!isExemptFromExactAlarmPermission(callingUid)) {
diff --git a/services/tests/mockingservicestests/src/com/android/server/alarm/AlarmManagerServiceTest.java b/services/tests/mockingservicestests/src/com/android/server/alarm/AlarmManagerServiceTest.java
index 32d9247..01ca494 100644
--- a/services/tests/mockingservicestests/src/com/android/server/alarm/AlarmManagerServiceTest.java
+++ b/services/tests/mockingservicestests/src/com/android/server/alarm/AlarmManagerServiceTest.java
@@ -2204,10 +2204,15 @@
         mBinder.set(TEST_CALLING_PACKAGE, RTC_WAKEUP, 1234, WINDOW_EXACT, 0, 0,
                 alarmPi, null, null, null, alarmClock);
 
+        final ArgumentCaptor<Bundle> bundleCaptor = ArgumentCaptor.forClass(Bundle.class);
         verify(mService).setImpl(eq(RTC_WAKEUP), eq(1234L), eq(WINDOW_EXACT), eq(0L),
                 eq(alarmPi), isNull(), isNull(), eq(FLAG_STANDALONE | FLAG_WAKE_FROM_IDLE),
-                isNull(), eq(alarmClock), eq(TEST_CALLING_UID), eq(TEST_CALLING_PACKAGE), isNull(),
-                eq(EXACT_ALLOW_REASON_COMPAT));
+                isNull(), eq(alarmClock), eq(TEST_CALLING_UID), eq(TEST_CALLING_PACKAGE),
+                bundleCaptor.capture(), eq(EXACT_ALLOW_REASON_COMPAT));
+
+        final BroadcastOptions idleOptions = new BroadcastOptions(bundleCaptor.getValue());
+        final int type = idleOptions.getTemporaryAppAllowlistType();
+        assertEquals(TEMPORARY_ALLOWLIST_TYPE_FOREGROUND_SERVICE_ALLOWED, type);
     }
 
     @Test