diff --git a/ReactCommon/fabric/mounting/MountingTelemetry.cpp b/ReactCommon/fabric/mounting/MountingTelemetry.cpp
index 5f5bdf30ab7..121c51e4551 100644
--- a/ReactCommon/fabric/mounting/MountingTelemetry.cpp
+++ b/ReactCommon/fabric/mounting/MountingTelemetry.cpp
@@ -47,7 +47,7 @@ int64_t MountingTelemetry::getCommitTime() const {
 int64_t MountingTelemetry::getLayoutTime() const {
   assert(layoutStartTime_ != kUndefinedTime);
   assert(layoutEndTime_ != kUndefinedTime);
-  return layoutEndTime_ - layoutEndTime_;
+  return layoutEndTime_ - layoutStartTime_;
 }
 
 int64_t MountingTelemetry::getCommitStartTime() const {