diff --git a/src/librssguard/core/feeddownloader.cpp b/src/librssguard/core/feeddownloader.cpp
index 39a47bb5a..a43c195cf 100644
--- a/src/librssguard/core/feeddownloader.cpp
+++ b/src/librssguard/core/feeddownloader.cpp
@@ -157,7 +157,12 @@ void FeedDownloader::updateFeeds(const QList<Feed*>& feeds) {
       return updateThreadedFeed(fd);
     };
 
-    m_watcherLookup.setFuture(QtConcurrent::mapped(qApp->workHorsePool(), m_feeds, func));
+    m_watcherLookup.setFuture(QtConcurrent::mapped(
+#if QT_VERSION_MAJOR > 5
+      qApp->workHorsePool(),
+#endif
+      m_feeds,
+      func));
   }
 }
 
diff --git a/src/librssguard/miscellaneous/application.cpp b/src/librssguard/miscellaneous/application.cpp
index 5c9fea744..6c3ce8e4f 100644
--- a/src/librssguard/miscellaneous/application.cpp
+++ b/src/librssguard/miscellaneous/application.cpp
@@ -967,6 +967,14 @@ void Application::setupWorkHorsePool() {
   // NOTE: Do not expire threads so that their IDs are not reused.
   // This fixes cross-thread QSqlDatabase access.
   m_workHorsePool->setExpiryTimeout(-1);
+
+#if QT_VERSION_MAJOR == 5
+  // NOTE: Qt 5 sadly does not allow to specify custom thread pool for
+  // QtConcurrent::mapped() method, so we have to use global thread pool
+  // there.
+  QThreadPool::globalInstance()->setMaxThreadCount(m_workHorsePool->maxThreadCount());
+  QThreadPool::globalInstance()->setExpiryTimeout(m_workHorsePool->expiryTimeout());
+#endif
 }
 
 void Application::onAdBlockFailure() {
diff --git a/src/librssguard/services/standard/standardfeedsimportexportmodel.cpp b/src/librssguard/services/standard/standardfeedsimportexportmodel.cpp
index 6ba872faf..cbcf13739 100644
--- a/src/librssguard/services/standard/standardfeedsimportexportmodel.cpp
+++ b/src/librssguard/services/standard/standardfeedsimportexportmodel.cpp
@@ -380,7 +380,11 @@ void FeedsImportExportModel::importAsOPML20(const QByteArray& data,
     return produceFeed(lookup);
   };
 
+#if QT_VERSION_MAJOR == 5
+  QFuture<bool> fut = QtConcurrent::mapped(m_lookup, func);
+#else
   QFuture<bool> fut = QtConcurrent::mapped(qApp->workHorsePool(), m_lookup, func);
+#endif
 
   m_watcherLookup.setFuture(fut);
 
@@ -445,7 +449,11 @@ void FeedsImportExportModel::importAsTxtURLPerLine(const QByteArray& data,
     return produceFeed(lookup);
   };
 
+#if QT_VERSION_MAJOR == 5
+  QFuture<bool> fut = QtConcurrent::mapped(m_lookup, func);
+#else
   QFuture<bool> fut = QtConcurrent::mapped(qApp->workHorsePool(), m_lookup, func);
+#endif
 
   m_watcherLookup.setFuture(fut);