diff --git a/src/thumbnaildownloader.cpp b/src/thumbnaildownloader.cpp
index ce8f9f8..fafd5ea 100644
--- a/src/thumbnaildownloader.cpp
+++ b/src/thumbnaildownloader.cpp
@@ -4,7 +4,7 @@
 #include <QPixmap>
 #include <QIcon>
 
-ThumbnailDownloader::ThumbnailDownloader(QObject *parent)
+ThumbnailDownloader::ThumbnailDownloader()
 {
     connect(this, &ThumbnailDownloader::oneThumbnailDownloaded, [=]() {
         if (m_urlPairList.size() != 0)
diff --git a/src/thumbnaildownloader.h b/src/thumbnaildownloader.h
index 12a81fa..8c5e450 100644
--- a/src/thumbnaildownloader.h
+++ b/src/thumbnaildownloader.h
@@ -17,7 +17,7 @@ public:
     typedef QPair<ThumbnailId, QString> ThumbnailInfo;
 
 public:
-    ThumbnailDownloader(QObject *parent = 0);
+    ThumbnailDownloader();
     ~ThumbnailDownloader();
 
     void addDownload(QString url, ThumbnailId index);