diff --git a/src/queue/MtInQueue.hpp b/src/queue/MtInQueue.hpp
index 1148893..d532c09 100644
--- a/src/queue/MtInQueue.hpp
+++ b/src/queue/MtInQueue.hpp
@@ -43,7 +43,7 @@ class MtInQueue
     ElePair pop();  // high performance
     template<class aEleType> shared_ptr<aEleType> pop() { return static_pointer_cast<aEleType>(pop().first); }
 
-    void mt_wakeMainFn() { if (mt_wakeMainFn_ != nullptr) mt_wakeMainFn_(); }
+    void mt_wakeMainFn() { if (mt_wakeMainFn_) mt_wakeMainFn_(); }
 
     size_t mt_size();
     size_t mt_clear();
diff --git a/ut/queue/MtInQueueTest.cpp b/ut/queue/MtInQueueTest.cpp
index 05342f4..1693366 100644
--- a/ut/queue/MtInQueueTest.cpp
+++ b/ut/queue/MtInQueueTest.cpp
@@ -45,6 +45,14 @@ struct MtInQueueTest : public Test, public UniLog
 };
 
 #define FIFO
+TEST_F(MtInQueueTest, GOLD_simple_fifo_without_waker)
+{
+    MtInQueue mtQ;
+    mtQ.mt_push<int>(make_shared<int>(1));
+    mtQ.mt_push<int>(make_shared<int>(2));
+    EXPECT_EQ(1, *(mtQ.pop<int>())) << "REQ: fifo";
+    EXPECT_EQ(2, *(mtQ.pop<int>())) << "REQ: fifo";
+}
 TEST_F(MtInQueueTest, GOLD_sparsePush_fifo)
 {
     const int nMsg = 10000;