diff --git a/YACReader/goto_flow.cpp b/YACReader/goto_flow.cpp
index 27c0c000..110a4aa1 100644
--- a/YACReader/goto_flow.cpp
+++ b/YACReader/goto_flow.cpp
@@ -244,7 +244,7 @@ PageLoader::~PageLoader()
 
 bool PageLoader::busy() const
 {
-    return isRunning() ? working : false;
+    return isRunning() ? working.load() : false;
 }
 
 void PageLoader::generate(int index, QSize size, const QByteArray &rImage)
@@ -283,8 +283,8 @@ void PageLoader::run()
         mutex->unlock();
 
         mutex->lock();
-        this->working = false;
         this->img = image;
+        this->working = false;
         mutex->unlock();
 
         // put to sleep
diff --git a/YACReader/goto_flow.h b/YACReader/goto_flow.h
index d119e8b5..09fe2ce0 100644
--- a/YACReader/goto_flow.h
+++ b/YACReader/goto_flow.h
@@ -9,6 +9,8 @@
 #include <QWaitCondition>
 #include <QMutex>
 
+#include <atomic>
+
 class QLineEdit;
 class QPushButton;
 class QPixmap;
@@ -89,7 +91,7 @@ private:
     QWaitCondition condition;
 
     bool restart;
-    bool working;
+    std::atomic<bool> working;
     int idx;
 
     QSize size;