diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index ea5025f..4ed6573 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -855,7 +855,7 @@
 
     mCompositionEngine->setTimeStats(mTimeStats);
     mCompositionEngine->setHwComposer(getFactory().createHWComposer(mHwcServiceName));
-    mCompositionEngine->getHwComposer().setCallback(this);
+    mCompositionEngine->getHwComposer().setCallback(*this);
     ClientCache::getInstance().setRenderEngine(&getRenderEngine());
 
     if (base::GetBoolProperty("debug.sf.enable_hwc_vds"s, false)) {
@@ -1965,6 +1965,11 @@
     scheduleComposite(FrameHint::kNone);
 }
 
+void SurfaceFlinger::onComposerHalVsyncIdle(hal::HWDisplayId) {
+    // TODO(b/198106220): force enable HWVsync to avoid drift problem during
+    // idle.
+}
+
 void SurfaceFlinger::setVsyncEnabled(bool enabled) {
     ATRACE_CALL();