diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index fde38c9..1119fce 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -4915,7 +4915,7 @@
     }
     // Numbers from 1000 to 1038 are currently used for backdoors. The code
     // in onTransact verifies that the user is root, and has access to use SF.
-    if (code >= 1000 && code <= 1038) {
+    if (code >= 1000 && code <= 1039) {
         ALOGV("Accessing SurfaceFlinger through backdoor code: %u", code);
         return OK;
     }
@@ -5280,6 +5280,13 @@
                 mFrameTimeline->setMaxDisplayFrames(n);
                 return NO_ERROR;
             }
+            case 1039: {
+                // The first parameter is the uid
+                n = data.readInt32();
+                const float refreshRateHz = data.readFloat();
+                mRefreshRateConfigs->setPreferredRefreshRateForUid(n, refreshRateHz);
+            }
+                return NO_ERROR;
         }
     }
     return err;