diff --git a/gui/checkthread.cpp b/gui/checkthread.cpp
index a36680c64bc..3d1a44a9a18 100644
--- a/gui/checkthread.cpp
+++ b/gui/checkthread.cpp
@@ -37,6 +37,7 @@
 #include <list>
 #include <set>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include <QByteArray>
@@ -110,11 +111,11 @@ CheckThread::CheckThread(ThreadResult &result) :
     mResult(result)
 {}
 
-void CheckThread::setSettings(const Settings &settings, Suppressions& supprs)
+void CheckThread::setSettings(const Settings &settings, std::shared_ptr<Suppressions> supprs)
 {
     mFiles.clear();
     mSettings = settings; // this is a copy
-    mSuppressions = &supprs;
+    mSuppressions = std::move(supprs);
 }
 
 void CheckThread::analyseWholeProgram(const QStringList &files, const std::string& ctuInfo)
diff --git a/gui/checkthread.h b/gui/checkthread.h
index fc5fd393d5a..827e75f1247 100644
--- a/gui/checkthread.h
+++ b/gui/checkthread.h
@@ -25,6 +25,7 @@
 
 #include <atomic>
 #include <cstdint>
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -55,7 +56,7 @@ class CheckThread : public QThread {
      * @param settings settings for cppcheck
      * @param supprs suppressions for cppcheck
      */
-    void setSettings(const Settings &settings, Suppressions& supprs);
+    void setSettings(const Settings &settings, std::shared_ptr<Suppressions> supprs);
 
     /**
      * @brief Run whole program analysis
@@ -132,7 +133,7 @@ class CheckThread : public QThread {
     ThreadResult &mResult;
 
     Settings mSettings;
-    Suppressions* mSuppressions{};
+    std::shared_ptr<Suppressions> mSuppressions;
 
 private:
     void runAddonsAndTools(const Settings& settings, const FileSettings *fileSettings, const QString &fileName);
diff --git a/gui/mainwindow.cpp b/gui/mainwindow.cpp
index 618de4352d6..15ac3936288 100644
--- a/gui/mainwindow.cpp
+++ b/gui/mainwindow.cpp
@@ -56,6 +56,7 @@
 #include <algorithm>
 #include <iterator>
 #include <list>
+#include <memory>
 #include <set>
 #include <string>
 #include <unordered_set>
@@ -542,8 +543,8 @@ void MainWindow::saveSettings() const
 void MainWindow::doAnalyzeProject(ImportProject p, const bool checkLibrary, const bool checkConfiguration)
 {
     Settings checkSettings;
-    Suppressions supprs;
-    if (!getCppcheckSettings(checkSettings, supprs))
+    auto supprs = std::make_shared<Suppressions>();
+    if (!getCppcheckSettings(checkSettings, *supprs))
         return;
 
     clearResults();
@@ -613,8 +614,8 @@ void MainWindow::doAnalyzeFiles(const QStringList &files, const bool checkLibrar
         return;
 
     Settings checkSettings;
-    Suppressions supprs;
-    if (!getCppcheckSettings(checkSettings, supprs))
+    auto supprs = std::make_shared<Suppressions>();
+    if (!getCppcheckSettings(checkSettings, *supprs))
         return;
 
     clearResults();
@@ -1348,8 +1349,8 @@ void MainWindow::reAnalyzeSelected(const QStringList& files)
     }
 
     Settings checkSettings;
-    Suppressions supprs;
-    if (!getCppcheckSettings(checkSettings, supprs))
+    auto supprs = std::make_shared<Suppressions>();
+    if (!getCppcheckSettings(checkSettings, *supprs))
         return;
 
     // Clear details, statistics and progress
@@ -1383,8 +1384,8 @@ void MainWindow::reAnalyze(bool all)
         return;
 
     Settings checkSettings;
-    Suppressions supprs;
-    if (!getCppcheckSettings(checkSettings, supprs))
+    auto supprs = std::make_shared<Suppressions>();
+    if (!getCppcheckSettings(checkSettings, *supprs))
         return;
 
     // Clear details, statistics and progress
diff --git a/gui/threadhandler.cpp b/gui/threadhandler.cpp
index f72bbdc53a5..fecfb44b23b 100644
--- a/gui/threadhandler.cpp
+++ b/gui/threadhandler.cpp
@@ -83,7 +83,7 @@ void ThreadHandler::setCheckFiles(const QStringList& files)
     }
 }
 
-void ThreadHandler::check(const Settings &settings, Suppressions& supprs)
+void ThreadHandler::check(const Settings &settings, const std::shared_ptr<Suppressions>& supprs)
 {
     if (mResults.getFileCount() == 0 || mRunningThreadCount > 0 || settings.jobs == 0) {
         qDebug() << "Can't start checking if there's no files to check or if check is in progress.";
diff --git a/gui/threadhandler.h b/gui/threadhandler.h
index ec2c9b81260..49a326933b0 100644
--- a/gui/threadhandler.h
+++ b/gui/threadhandler.h
@@ -23,6 +23,7 @@
 #include "suppressions.h"
 #include "threadresult.h"
 
+#include <memory>
 #include <set>
 #include <string>
 
@@ -117,7 +118,7 @@ class ThreadHandler : public QObject {
      * @param settings Settings for checking
      * @param supprs Suppressions for checking
      */
-    void check(const Settings &settings, Suppressions& supprs);
+    void check(const Settings &settings, const std::shared_ptr<Suppressions>& supprs);
 
     /**
      * @brief Set files to check