diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index 80fed98..bf34987 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -217,6 +217,7 @@
         "DebugEGLImageTracker.cpp",
         "DisplayEventDispatcher.cpp",
         "DisplayEventReceiver.cpp",
+        "FenceMonitor.cpp",
         "GLConsumer.cpp",
         "IConsumerListener.cpp",
         "IGraphicBufferConsumer.cpp",