diff --git a/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.cpp b/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.cpp
index a596bce..2a6fd05 100644
--- a/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.cpp
+++ b/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.cpp
@@ -243,7 +243,8 @@
     std::vector<Invocation> invocations;
     {
         std::lock_guard<decltype(mMutex)> lk(mMutex);
-        mLastTimerCallback = mTimeKeeper->now();
+        auto const now = mTimeKeeper->now();
+        mLastTimerCallback = now;
         for (auto it = mCallbacks.begin(); it != mCallbacks.end(); it++) {
             auto& callback = it->second;
             auto const wakeupTime = callback->wakeupTime();
@@ -251,7 +252,8 @@
                 continue;
             }
 
-            if (*wakeupTime < mIntendedWakeupTime + mTimerSlack) {
+            auto const lagAllowance = std::max(now - mIntendedWakeupTime, static_cast<nsecs_t>(0));
+            if (*wakeupTime < mIntendedWakeupTime + mTimerSlack + lagAllowance) {
                 callback->executing();
                 invocations.emplace_back(
                         Invocation{callback, *callback->lastExecutedVsyncTarget(), *wakeupTime});
diff --git a/services/surfaceflinger/tests/unittests/VSyncDispatchTimerQueueTest.cpp b/services/surfaceflinger/tests/unittests/VSyncDispatchTimerQueueTest.cpp
index d940dc5..db5d6af 100644
--- a/services/surfaceflinger/tests/unittests/VSyncDispatchTimerQueueTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncDispatchTimerQueueTest.cpp
@@ -115,11 +115,15 @@
 
     operator VSyncDispatch::CallbackToken() const { return mToken; }
 
-    void counter(nsecs_t time, nsecs_t) { mCalls.push_back(time); }
+    void counter(nsecs_t time, nsecs_t wakeup_time) {
+        mCalls.push_back(time);
+        mWakeupTime.push_back(wakeup_time);
+    }
 
     VSyncDispatch& mDispatch;
     VSyncDispatch::CallbackToken mToken;
     std::vector<nsecs_t> mCalls;
+    std::vector<nsecs_t> mWakeupTime;
 };
 
 class PausingCallback {
@@ -747,6 +751,31 @@
     EXPECT_THAT(cb2.mCalls.size(), Eq(1));
 }
 
+TEST_F(VSyncDispatchTimerQueueTest, laggedTimerGroupsCallbacksWithinLag) {
+    CountingCallback cb1(mDispatch);
+    CountingCallback cb2(mDispatch);
+
+    Sequence seq;
+    EXPECT_CALL(mStubTracker, nextAnticipatedVSyncTimeFrom(1000))
+            .InSequence(seq)
+            .WillOnce(Return(1000));
+    EXPECT_CALL(mMockClock, alarmIn(_, 600)).InSequence(seq);
+    EXPECT_CALL(mStubTracker, nextAnticipatedVSyncTimeFrom(1000))
+            .InSequence(seq)
+            .WillOnce(Return(1000));
+
+    EXPECT_EQ(mDispatch.schedule(cb1, 400, 1000), ScheduleResult::Scheduled);
+    EXPECT_EQ(mDispatch.schedule(cb2, 390, 1000), ScheduleResult::Scheduled);
+
+    mMockClock.setLag(100);
+    mMockClock.advanceBy(700);
+
+    ASSERT_THAT(cb1.mWakeupTime.size(), Eq(1));
+    EXPECT_THAT(cb1.mWakeupTime[0], Eq(600));
+    ASSERT_THAT(cb2.mWakeupTime.size(), Eq(1));
+    EXPECT_THAT(cb2.mWakeupTime[0], Eq(610));
+}
+
 class VSyncDispatchTimerQueueEntryTest : public testing::Test {
 protected:
     nsecs_t const mPeriod = 1000;