diff --git a/src/sdl/i_video.cpp b/src/sdl/i_video.cpp
index 92037d065..2f4d64db1 100644
--- a/src/sdl/i_video.cpp
+++ b/src/sdl/i_video.cpp
@@ -130,9 +130,9 @@ static       SDL_bool    borderlesswindow = SDL_FALSE;
 Uint16      realwidth = BASEVIDWIDTH;
 Uint16      realheight = BASEVIDHEIGHT;
 
-SDL_Window   *window;
-SDL_Renderer *renderer;
-static SDL_Texture  *texture;
+SDL_Window   *window = NULL;
+SDL_Renderer *renderer = NULL;
+static SDL_Texture  *texture = NULL;
 static SDL_bool      havefocus = SDL_TRUE;
 
 static UINT32 refresh_rate;