diff --git a/src/Backends/Rendering/SDLSurface.cpp b/src/Backends/Rendering/SDLSurface.cpp
index 5a7bfbd8..1d7b46aa 100644
--- a/src/Backends/Rendering/SDLSurface.cpp
+++ b/src/Backends/Rendering/SDLSurface.cpp
@@ -9,6 +9,7 @@
 #include "../../WindowsWrapper.h"
 
 #include "../Platform.h"
+#include "SDL2.h"
 
 typedef struct Backend_Surface
 {
@@ -20,8 +21,6 @@ typedef struct Backend_Glyph
 	SDL_Surface *sdlsurface;
 } Backend_Glyph;
 
-extern SDL_Window *window;
-
 static SDL_Surface *window_sdlsurface;
 
 static Backend_Surface framebuffer;
diff --git a/src/Backends/Rendering/SDLTexture.cpp b/src/Backends/Rendering/SDLTexture.cpp
index e06ca06f..b5fb61b3 100644
--- a/src/Backends/Rendering/SDLTexture.cpp
+++ b/src/Backends/Rendering/SDLTexture.cpp
@@ -13,6 +13,7 @@
 #include "../../WindowsWrapper.h"
 
 #include "../Platform.h"
+#include "SDL2.h"
 #include "../../Draw.h"
 #include "../../Ending.h"
 #include "../../MapName.h"
@@ -37,8 +38,6 @@ typedef struct Backend_Glyph
 	unsigned int height;
 } Backend_Glyph;
 
-extern SDL_Window *window;
-
 static SDL_Renderer *renderer;
 
 static Backend_Surface framebuffer;
diff --git a/src/Backends/Rendering/Software.cpp b/src/Backends/Rendering/Software.cpp
index 5d5f32cf..e1ddbd8f 100644
--- a/src/Backends/Rendering/Software.cpp
+++ b/src/Backends/Rendering/Software.cpp
@@ -9,6 +9,7 @@
 #include "../../WindowsWrapper.h"
 
 #include "../Platform.h"
+#include "SDL2.h"
 
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
@@ -28,8 +29,6 @@ typedef struct Backend_Glyph
 	unsigned int height;
 } Backend_Glyph;
 
-extern SDL_Window *window;
-
 static SDL_Surface *window_sdlsurface;
 static SDL_Surface *framebuffer_sdlsurface;
 static Backend_Surface framebuffer;