diff --git a/Utilities/Log.cpp b/Utilities/Log.cpp
index 1f736617cf..562be95d8a 100644
--- a/Utilities/Log.cpp
+++ b/Utilities/Log.cpp
@@ -11,13 +11,13 @@ using namespace Log;
 
 LogManager *gLogManager = nullptr;
 
-u32 LogMessage::size()
+u32 LogMessage::size() const
 {
 	//1 byte for NULL terminator
 	return (u32)(sizeof(LogMessage::size_type) + sizeof(LogType) + sizeof(LogSeverity) + sizeof(std::string::value_type) * mText.size() + 1);
 }
 
-void LogMessage::serialize(char *output)
+void LogMessage::serialize(char *output) const
 {
 	LogMessage::size_type size = this->size();
 	memcpy(output, &size, sizeof(LogMessage::size_type));
@@ -60,7 +60,7 @@ LogChannel::LogChannel(const std::string& name) :
 	, mLogLevel(Warning)
 {}
 
-void LogChannel::log(LogMessage msg)
+void LogChannel::log(const LogMessage &msg)
 {
 	std::lock_guard<std::mutex> lock(mListenerLock);
 	for (auto &listener : mListeners)
@@ -82,7 +82,7 @@ void LogChannel::removeListener(std::shared_ptr<LogListener> listener)
 
 struct CoutListener : LogListener
 {
-	void log(LogMessage msg)
+	void log(const LogMessage &msg)
 	{
 		std::cerr << msg.mText << std::endl;
 	}
@@ -103,13 +103,15 @@ struct FileListener : LogListener
 		}
 	}
 
-	void log(LogMessage msg)
+	void log(const LogMessage &msg)
 	{
+		std::string text = msg.mText;
 		if (mPrependChannelName)
 		{
-			msg.mText.insert(0, gTypeNameTable[static_cast<u32>(msg.mType)].mName);
+			text.insert(0, gTypeNameTable[static_cast<u32>(msg.mType)].mName);
+
 		}
-		mFile.Write(msg.mText);
+		mFile.Write(text);
 	}
 };
 
diff --git a/Utilities/Log.h b/Utilities/Log.h
index 46fc604f5a..c40d2a82c6 100644
--- a/Utilities/Log.h
+++ b/Utilities/Log.h
@@ -63,15 +63,15 @@ namespace Log
 		LogSeverity mServerity;
 		std::string mText;
 
-		u32 size();
-		void serialize(char *output);
+		u32 size() const;
+		void serialize(char *output) const;
 		static LogMessage deserialize(char *input, u32* size_out=nullptr);
 	};
 
 	struct LogListener
 	{
 		virtual ~LogListener() {};
-		virtual void log(LogMessage msg) = 0;
+		virtual void log(const LogMessage &msg) = 0;
 	};
 
 	struct LogChannel
@@ -80,7 +80,7 @@ namespace Log
 		LogChannel(const std::string& name);
 		LogChannel(LogChannel& other) = delete;
 		LogChannel& operator = (LogChannel& other) = delete;
-		void log(LogMessage msg);
+		void log(const LogMessage &msg);
 		void addListener(std::shared_ptr<LogListener> listener);
 		void removeListener(std::shared_ptr<LogListener> listener);
 		std::string name;
diff --git a/rpcs3/Gui/ConLogFrame.cpp b/rpcs3/Gui/ConLogFrame.cpp
index 9e9d0209fc..879da2e003 100644
--- a/rpcs3/Gui/ConLogFrame.cpp
+++ b/rpcs3/Gui/ConLogFrame.cpp
@@ -97,7 +97,7 @@ struct wxWriter : Log::LogListener
 	}
 
 	//put message into the log buffer
-	void log(Log::LogMessage msg)
+	void log(const Log::LogMessage &msg)
 	{
 		u8 logLevel = Ini.HLELogLvl.GetValue();
 		if (msg.mType != Log::TTY && logLevel != 0)