diff --git a/core/consensus/sumeragi.cpp b/core/consensus/sumeragi.cpp
index 0dc88491c7..7117dcbafe 100644
--- a/core/consensus/sumeragi.cpp
+++ b/core/consensus/sumeragi.cpp
@@ -413,7 +413,7 @@ namespace sumeragi {
         std::thread([action, sleepMillisecs]() {
             std::this_thread::sleep_for(std::chrono::milliseconds(sleepMillisecs));
             action();
-        });
+        }).join();
     }
 
     /**