diff --git a/src/sdl/sdlvideo.cpp b/src/sdl/sdlvideo.cpp
index c479351ab..441ef0d20 100644
--- a/src/sdl/sdlvideo.cpp
+++ b/src/sdl/sdlvideo.cpp
@@ -222,6 +222,8 @@ DFrameBuffer *SDLVideo::CreateFrameBuffer (int width, int height, bool fullscree
 			return old;
 		}
 		old->GetFlash (flashColor, flashAmount);
+		old->ObjectFlags |= OF_YesReallyDelete;
+		if (screen == old) screen = NULL;
 		delete old;
 	}
 	else
diff --git a/src/win32/win32video.cpp b/src/win32/win32video.cpp
index 800f512f0..dbdc8990b 100644
--- a/src/win32/win32video.cpp
+++ b/src/win32/win32video.cpp
@@ -505,6 +505,7 @@ DFrameBuffer *Win32Video::CreateFrameBuffer (int width, int height, bool fullscr
 		}
 		old->GetFlash (flashColor, flashAmount);
 		old->ObjectFlags |= OF_YesReallyDelete;
+		if (old == screen) screen = NULL;
 		delete old;
 	}
 	else