diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 6449e57..3af1754 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -582,7 +582,11 @@
     };
     mutable Mutex mBufferingStatsMutex;
     std::unordered_map<std::string, BufferingStats> mBufferingStats;
-};
+
+    // Verify that transaction is being called by an approved process:
+    // either AID_GRAPHICS or AID_SYSTEM.
+    status_t CheckTransactCodeCredentials(uint32_t code);
+    };
 
 }; // namespace android