diff --git a/receiver/JFJochReceiverCurrentStatus.cpp b/receiver/JFJochReceiverCurrentStatus.cpp
index e0c1d637..1ec646f2 100644
--- a/receiver/JFJochReceiverCurrentStatus.cpp
+++ b/receiver/JFJochReceiverCurrentStatus.cpp
@@ -21,7 +21,8 @@ void JFJochReceiverCurrentStatus::SetStatus(const JFJochReceiverStatus &in_statu
 
 void JFJochReceiverCurrentStatus::SetEfficiency(const std::optional<float> &e) {
     std::unique_lock ul(m);
-    status->efficiency = e;
+    if (status.has_value())
+        status->efficiency = e;
 }
 
 std::optional<float> JFJochReceiverCurrentStatus::GetProgress() const {