diff --git a/services/surfaceflinger/DisplayHardware/HWC2.h b/services/surfaceflinger/DisplayHardware/HWC2.h
index 8b532e3..e7cf5ff 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2.h
@@ -76,6 +76,7 @@
     virtual void onVsyncPeriodTimingChangedReceived(
             int32_t sequenceId, hwc2_display_t display,
             const hwc_vsync_period_change_timeline_t& updatedTimeline) = 0;
+    virtual void onSeamlessPossible(int32_t sequenceId, hwc2_display_t display) = 0;
 
     virtual ~ComposerCallback() = default;
 };
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index 0a7009b..1960f43 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -125,6 +125,11 @@
         return android::hardware::Void();
     }
 
+    android::hardware::Return<void> onSeamlessPossible(android::Hwc2::Display display) override {
+        mCallback->onSeamlessPossible(mSequenceId, display);
+        return android::hardware::Void();
+    }
+
 private:
     HWC2::ComposerCallback* mCallback;
     const int32_t mSequenceId;