diff --git a/doomsday/engine/portable/include/dd_main.h b/doomsday/engine/portable/include/dd_main.h
index ba5ba6a74b..4466450dbe 100644
--- a/doomsday/engine/portable/include/dd_main.h
+++ b/doomsday/engine/portable/include/dd_main.h
@@ -59,6 +59,10 @@ extern Game* theGame;
 
 int DD_EarlyInit(void);
 int DD_Main(void);
+
+/// @return  @c true if shutdown is in progress.
+boolean DD_IsShuttingDown(void);
+
 void DD_CheckTimeDemo(void);
 void DD_UpdateEngineState(void);
 
diff --git a/doomsday/engine/portable/include/sys_system.h b/doomsday/engine/portable/include/sys_system.h
index 99bd105ffb..ff27eedf00 100644
--- a/doomsday/engine/portable/include/sys_system.h
+++ b/doomsday/engine/portable/include/sys_system.h
@@ -43,6 +43,9 @@ void Sys_Init(void);
 void Sys_Shutdown(void);
 void Sys_Quit(void);
 
+/// @return  @c true if shutdown is in progress.
+boolean Sys_IsShuttingDown(void);
+
 int Sys_CriticalMessage(const char* msg);
 int Sys_CriticalMessagef(const char* format, ...) PRINTF_F(1,2);
 
diff --git a/doomsday/engine/portable/src/dd_main.c b/doomsday/engine/portable/src/dd_main.c
index a01c84e625..fb58996dbc 100644
--- a/doomsday/engine/portable/src/dd_main.c
+++ b/doomsday/engine/portable/src/dd_main.c
@@ -1263,6 +1263,11 @@ boolean DD_ChangeGame(Game* game)
     return DD_ChangeGame2(game, false);
 }
 
+boolean DD_IsShuttingDown(void)
+{
+    return Sys_IsShuttingDown();
+}
+
 /**
  * Looks for new files to autoload from the auto-load data directory.
  */
diff --git a/doomsday/engine/portable/src/sys_system.c b/doomsday/engine/portable/src/sys_system.c
index e0f640912f..ced26202ca 100644
--- a/doomsday/engine/portable/src/sys_system.c
+++ b/doomsday/engine/portable/src/sys_system.c
@@ -27,8 +27,6 @@
  * Abstract interfaces to platform-level services.
  */
 
-// HEADER FILES ------------------------------------------------------------
-
 #ifdef WIN32
 #  include <windows.h>
 #  include <process.h>
@@ -47,27 +45,9 @@
 #include "de_audio.h"
 #include "de_misc.h"
 
-// MACROS ------------------------------------------------------------------
-
-// TYPES -------------------------------------------------------------------
-
-// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
-
-// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
-
-// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
-
-// EXTERNAL DATA DECLARATIONS ----------------------------------------------
-
-// PUBLIC DATA DEFINITIONS -------------------------------------------------
-
 //int       systics = 0;    // System tics (every game tic).
 int novideo;                // if true, stay in text mode for debugging
 
-// PRIVATE DATA DEFINITIONS ------------------------------------------------
-
-// CODE --------------------------------------------------------------------
-
 #ifdef WIN32
 /**
  * Borrowed from Lee Killough.
@@ -135,6 +115,11 @@ void Sys_Init(void)
     VERBOSE2( Con_Message("Sys_Init: Done in %.2f seconds.\n", (Sys_GetRealTime() - startTime) / 1000.0f) );
 }
 
+boolean Sys_IsShuttingDown(void)
+{
+    return appShutdown;
+}
+
 /**
  * Return to default system state.
  */