diff --git a/Source/Core/CommonStats.cpp b/Source/Core/CommonStats.cpp
index c91266977..5f7d850b7 100644
--- a/Source/Core/CommonStats.cpp
+++ b/Source/Core/CommonStats.cpp
@@ -263,9 +263,6 @@ void CommonStats::writeAdditionalStats(std::stringstream &stream, size_t index)
 
 void CommonStats::updateAdditionalStats(StatsValueInfo::Type type, size_t oldSize, size_t size)
 {
-    // Lock data
-    QMutexLocker Lock(&Mutex);
-
     if (type==StatsValueInfo::Int)
     {
         auto additionalIntStats_Old = additionalIntStats;
diff --git a/Source/Core/CommonStats.h b/Source/Core/CommonStats.h
index bb1e50d46..a94d33213 100644
--- a/Source/Core/CommonStats.h
+++ b/Source/Core/CommonStats.h
@@ -166,7 +166,6 @@ class CommonStats
     typedef std::string StringStatsKey;
 
     void initializeAdditionalStats();
-    void updateAdditionalStats(StatsValueInfo::Type type, size_t oldSize, size_t size);
     void processAdditionalStats(const char* key, const char* value, bool statsMapInitialized);
     void writeAdditionalStats(std::stringstream& stream, size_t index);
 
@@ -200,8 +199,11 @@ class CommonStats
     double**                    additionalDoubleStats;
     char***                     additionalStringStats;
 
-   // Thread synchronisation
-   QMutex                       Mutex;
+    // Thread synchronisation
+    QMutex                       Mutex;
+
+    // Internal functions
+    void updateAdditionalStats(StatsValueInfo::Type type, size_t oldSize, size_t size);
 };
 
 #endif // Stats_H