diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 5dad4a9..88ece50 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -695,8 +695,7 @@
 
     InputWindowInfo::Type getWindowType() const { return mWindowType; }
 
-    void setPrimaryDisplayOnly() { mPrimaryDisplayOnly = true; }
-    bool getPrimaryDisplayOnly() const { return mPrimaryDisplayOnly; }
+    bool getPrimaryDisplayOnly() const;
 
     void updateMirrorInfo();
 
@@ -963,8 +962,6 @@
     const std::string mName;
     const std::string mTransactionName{"TX - " + mName};
 
-    bool mPrimaryDisplayOnly = false;
-
     // These are only accessed by the main thread or the tracing thread.
     State mDrawingState;
     // Store a copy of the pending state so that the drawing thread can access the