diff --git a/3rdparty/singleapplication/singleapplication_p.cpp b/3rdparty/singleapplication/singleapplication_p.cpp
index 71f66f9d..84b9c09a 100644
--- a/3rdparty/singleapplication/singleapplication_p.cpp
+++ b/3rdparty/singleapplication/singleapplication_p.cpp
@@ -286,7 +286,7 @@ void SingleApplicationPrivate::writeAck(QLocalSocket *sock) {
   sock->putChar('\n');
 }
 
-bool SingleApplicationPrivate::writeConfirmedMessage(const int timeout, const QByteArray &msg) {
+bool SingleApplicationPrivate::writeConfirmedMessage(const int timeout, const QByteArray &msg) const {
 
   QElapsedTimer time;
   time.start();
@@ -306,7 +306,7 @@ bool SingleApplicationPrivate::writeConfirmedMessage(const int timeout, const QB
 
 }
 
-bool SingleApplicationPrivate::writeConfirmedFrame(const int timeout, const QByteArray &msg) {
+bool SingleApplicationPrivate::writeConfirmedFrame(const int timeout, const QByteArray &msg) const {
 
   socket_->write(msg);
   socket_->flush();
diff --git a/3rdparty/singleapplication/singleapplication_p.h b/3rdparty/singleapplication/singleapplication_p.h
index 2f698741..26f334ae 100644
--- a/3rdparty/singleapplication/singleapplication_p.h
+++ b/3rdparty/singleapplication/singleapplication_p.h
@@ -94,8 +94,8 @@ class SingleApplicationPrivate : public QObject {
   void readMessageHeader(QLocalSocket *socket, const ConnectionStage nextStage);
   void readInitMessageBody(QLocalSocket *socket);
   void writeAck(QLocalSocket *sock);
-  bool writeConfirmedFrame(const int timeout, const QByteArray &msg);
-  bool writeConfirmedMessage(const int timeout, const QByteArray &msg);
+  bool writeConfirmedFrame(const int timeout, const QByteArray &msg) const;
+  bool writeConfirmedMessage(const int timeout, const QByteArray &msg) const;
   static void randomSleep();
 
   SingleApplication *q_ptr;
diff --git a/3rdparty/singleapplication/singlecoreapplication_p.cpp b/3rdparty/singleapplication/singlecoreapplication_p.cpp
index 536fcf73..5b31b2e3 100644
--- a/3rdparty/singleapplication/singlecoreapplication_p.cpp
+++ b/3rdparty/singleapplication/singlecoreapplication_p.cpp
@@ -286,7 +286,7 @@ void SingleCoreApplicationPrivate::writeAck(QLocalSocket *sock) {
   sock->putChar('\n');
 }
 
-bool SingleCoreApplicationPrivate::writeConfirmedMessage(const int timeout, const QByteArray &msg) {
+bool SingleCoreApplicationPrivate::writeConfirmedMessage(const int timeout, const QByteArray &msg) const {
 
   QElapsedTimer time;
   time.start();
@@ -306,7 +306,7 @@ bool SingleCoreApplicationPrivate::writeConfirmedMessage(const int timeout, cons
 
 }
 
-bool SingleCoreApplicationPrivate::writeConfirmedFrame(const int timeout, const QByteArray &msg) {
+bool SingleCoreApplicationPrivate::writeConfirmedFrame(const int timeout, const QByteArray &msg) const {
 
   socket_->write(msg);
   socket_->flush();
diff --git a/3rdparty/singleapplication/singlecoreapplication_p.h b/3rdparty/singleapplication/singlecoreapplication_p.h
index 8a0fa427..bc3d7236 100644
--- a/3rdparty/singleapplication/singlecoreapplication_p.h
+++ b/3rdparty/singleapplication/singlecoreapplication_p.h
@@ -94,8 +94,8 @@ class SingleCoreApplicationPrivate : public QObject {
   void readMessageHeader(QLocalSocket *socket, const ConnectionStage nextStage);
   void readInitMessageBody(QLocalSocket *socket);
   void writeAck(QLocalSocket *sock);
-  bool writeConfirmedFrame(const int timeout, const QByteArray &msg);
-  bool writeConfirmedMessage(const int timeout, const QByteArray &msg);
+  bool writeConfirmedFrame(const int timeout, const QByteArray &msg) const;
+  bool writeConfirmedMessage(const int timeout, const QByteArray &msg) const;
   static void randomSleep();
 
   SingleCoreApplication *q_ptr;