diff --git a/3rdparty/singleapplication/singleapplication_p.cpp b/3rdparty/singleapplication/singleapplication_p.cpp
index c2e67aaaf..01cfe5973 100644
--- a/3rdparty/singleapplication/singleapplication_p.cpp
+++ b/3rdparty/singleapplication/singleapplication_p.cpp
@@ -169,7 +169,7 @@ void SingleApplicationPrivate::genBlockServerName() {
 
 }
 
-void SingleApplicationPrivate::initializeMemoryBlock() {
+void SingleApplicationPrivate::initializeMemoryBlock() const {
 
   InstancesInfo *inst = static_cast<InstancesInfo*>(memory_->data());
   inst->primary = false;
diff --git a/3rdparty/singleapplication/singleapplication_p.h b/3rdparty/singleapplication/singleapplication_p.h
index 9ddb5f8f4..3ff1fd62f 100644
--- a/3rdparty/singleapplication/singleapplication_p.h
+++ b/3rdparty/singleapplication/singleapplication_p.h
@@ -82,7 +82,7 @@ class SingleApplicationPrivate : public QObject {
 
   static QString getUsername();
   void genBlockServerName();
-  void initializeMemoryBlock();
+  void initializeMemoryBlock() const;
   void startPrimary();
   void startSecondary();
   bool connectToPrimary(const int timeout, const ConnectionType connectionType);
diff --git a/3rdparty/singleapplication/singlecoreapplication_p.cpp b/3rdparty/singleapplication/singlecoreapplication_p.cpp
index 7d8c89c02..7561da03d 100644
--- a/3rdparty/singleapplication/singlecoreapplication_p.cpp
+++ b/3rdparty/singleapplication/singlecoreapplication_p.cpp
@@ -169,7 +169,7 @@ void SingleCoreApplicationPrivate::genBlockServerName() {
 
 }
 
-void SingleCoreApplicationPrivate::initializeMemoryBlock() {
+void SingleCoreApplicationPrivate::initializeMemoryBlock() const {
 
   InstancesInfo *inst = static_cast<InstancesInfo*>(memory_->data());
   inst->primary = false;
diff --git a/3rdparty/singleapplication/singlecoreapplication_p.h b/3rdparty/singleapplication/singlecoreapplication_p.h
index 9451826b1..814af03da 100644
--- a/3rdparty/singleapplication/singlecoreapplication_p.h
+++ b/3rdparty/singleapplication/singlecoreapplication_p.h
@@ -82,7 +82,7 @@ class SingleCoreApplicationPrivate : public QObject {
 
   static QString getUsername();
   void genBlockServerName();
-  void initializeMemoryBlock();
+  void initializeMemoryBlock() const;
   void startPrimary();
   void startSecondary();
   bool connectToPrimary(const int timeout, const ConnectionType connectionType);