diff --git a/Engine/source/windowManager/sdl/sdlWindowMgr.cpp b/Engine/source/windowManager/sdl/sdlWindowMgr.cpp
index dad0686d9..9b95304df 100644
--- a/Engine/source/windowManager/sdl/sdlWindowMgr.cpp
+++ b/Engine/source/windowManager/sdl/sdlWindowMgr.cpp
@@ -68,6 +68,8 @@ PlatformWindowManagerSDL::PlatformWindowManagerSDL()
 
 PlatformWindowManagerSDL::~PlatformWindowManagerSDL()
 {
+   if (mWindowListHead == NULL)
+      return;
    // Kill all our windows first.
    while(mWindowListHead)
       // The destructors update the list, so this works just fine.