diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index 566bb8e..be00079 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -127,7 +127,7 @@
     mVsyncModulator->cancelRefreshRateChange();
 
     mVsyncConfiguration->reset();
-    updatePhaseConfiguration(pacesetterSelectorPtr()->getActiveMode().fps);
+    updatePhaseConfiguration(pacesetterId, pacesetterSelectorPtr()->getActiveMode().fps);
 }
 
 void Scheduler::registerDisplay(PhysicalDisplayId displayId, RefreshRateSelectorPtr selectorPtr,
@@ -487,7 +487,12 @@
     }
 }
 
-void Scheduler::updatePhaseConfiguration(Fps refreshRate) {
+void Scheduler::updatePhaseConfiguration(PhysicalDisplayId displayId, Fps refreshRate) {
+    const bool isPacesetter =
+            FTL_FAKE_GUARD(kMainThreadContext,
+                           (std::scoped_lock(mDisplayLock), displayId == mPacesetterDisplayId));
+    if (!isPacesetter) return;
+
     mRefreshRateStats->setRefreshRate(refreshRate);
     mVsyncConfiguration->setRefreshRateFps(refreshRate);
     setVsyncConfig(mVsyncModulator->setVsyncConfigSet(mVsyncConfiguration->getCurrentConfigs()),
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index 88f0e94..1367ec3 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -187,7 +187,7 @@
         }
     }
 
-    void updatePhaseConfiguration(Fps);
+    void updatePhaseConfiguration(PhysicalDisplayId, Fps);
 
     const VsyncConfiguration& getVsyncConfiguration() const { return *mVsyncConfiguration; }