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 92068e516207e..57b6935c6f5cb 100644
--- a/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java
+++ b/apex/jobscheduler/service/java/com/android/server/alarm/AlarmManagerService.java
@@ -2848,7 +2848,11 @@ public class AlarmManagerService extends SystemService {
                 } else {
                     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 (exact) {
                         exactAllowReason = EXACT_ALLOW_REASON_COMPAT;
                     }
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 c8c87075eda29..102d17c86c3b2 100644
--- a/services/tests/mockingservicestests/src/com/android/server/alarm/AlarmManagerServiceTest.java
+++ b/services/tests/mockingservicestests/src/com/android/server/alarm/AlarmManagerServiceTest.java
@@ -2355,10 +2355,15 @@ public class AlarmManagerServiceTest {
         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