diff --git a/src/drivers/Qt/ConsoleWindow.cpp b/src/drivers/Qt/ConsoleWindow.cpp
index 14cc489f..5330a54a 100644
--- a/src/drivers/Qt/ConsoleWindow.cpp
+++ b/src/drivers/Qt/ConsoleWindow.cpp
@@ -124,6 +124,7 @@ consoleWin_t::consoleWin_t(QWidget *parent)
 
 	g_config->getOption( "SDL.PauseOnMainMenuAccess", &mainMenuPauseWhenActv );
 	g_config->getOption( "SDL.ContextMenuEnable", &contextMenuEnable );
+	g_config->getOption( "SDL.Sound.MuteOnDefocus", &muteSoundOnDefocus );
 	g_config->getOption ("SDL.VideoDriver", &use_SDL_video);
 
 	if ( use_SDL_video )
@@ -359,6 +360,8 @@ void consoleWin_t::initScreenHandler(void)
 				scrHandlerConnected = true;
 
 				winScreenChanged( hdl->screen() );
+
+				connect( hdl, SIGNAL(activeChanged(void)), this, SLOT(winActiveChanged(void)) );
 			}
 		}
 	}
@@ -381,6 +384,37 @@ void consoleWin_t::winScreenChanged(QScreen *scr)
 	}
 }
 
+void consoleWin_t::winActiveChanged(void)
+{
+	QWidget *w;
+
+	w = this->window();
+
+	if ( w != NULL)
+	{
+		QWindow *hdl = w->windowHandle();
+
+		if (hdl != NULL)
+		{
+			if ( muteSoundOnDefocus )
+			{
+				fceuWrapperLock();
+				if ( hdl->isActive() )
+				{
+					int vol;
+					g_config->getOption("SDL.Sound.Volume", &vol);
+					FCEUI_SetSoundVolume(vol);
+				}
+				else
+				{
+					FCEUI_SetSoundVolume(0);
+				}
+				fceuWrapperUnLock();
+			}
+		}
+	}
+}
+
 QSize consoleWin_t::calcRequiredSize(void)
 {
 	QSize out( GL_NES_WIDTH, GL_NES_HEIGHT );
diff --git a/src/drivers/Qt/ConsoleWindow.h b/src/drivers/Qt/ConsoleWindow.h
index 7640fdd8..ee41cdfc 100644
--- a/src/drivers/Qt/ConsoleWindow.h
+++ b/src/drivers/Qt/ConsoleWindow.h
@@ -254,6 +254,7 @@ class  consoleWin_t : public QMainWindow
 		bool        mainMenuPauseWhenActv;
 		bool        scrHandlerConnected;
 		bool        contextMenuEnable;
+		bool        muteSoundOnDefocus;
 
 		std::list <std::string*> romList;
 		std::vector <autoFireMenuAction*> afActList;
@@ -417,6 +418,7 @@ class  consoleWin_t : public QMainWindow
 		void wavRecordAsStart(void);
 		void wavRecordStop(void);
 		void winScreenChanged( QScreen *scr );
+		void winActiveChanged(void);
 		void emuFrameFinish(void);
 
 };
diff --git a/src/drivers/Qt/config.cpp b/src/drivers/Qt/config.cpp
index 2f8ebddc..6286a8f0 100644
--- a/src/drivers/Qt/config.cpp
+++ b/src/drivers/Qt/config.cpp
@@ -486,6 +486,7 @@ InitConfig()
 	config->addOption("soundrecord", "SDL.Sound.RecordFile", "");
 	config->addOption("soundbufsize", "SDL.Sound.BufSize", 128);
 	config->addOption("lowpass", "SDL.Sound.LowPass", 0);
+	config->addOption("SDL.Sound.MuteOnDefocus", 0);
     
 	config->addOption('g', "gamegenie", "SDL.GameGenie", 0);
 	config->addOption("pal", "SDL.PAL", 0);