diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index 1e33abb..052b519 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -264,6 +264,7 @@
         "DisplayEventDispatcher.cpp",
         "DisplayEventReceiver.cpp",
         "FenceMonitor.cpp",
+        "Flags.cpp",
         "GLConsumer.cpp",
         "IConsumerListener.cpp",
         "IGraphicBufferConsumer.cpp",