diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index b139cf1..f6253a2 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -53,6 +53,7 @@
 namespace android {
 
 using gui::FocusRequest;
+using gui::IRegionSamplingListener;
 using gui::WindowInfo;
 using gui::WindowInfoHandle;
 using gui::WindowInfosListener;