diff --git a/window.c b/window.c
index bc57045..7608f13 100644
--- a/window.c
+++ b/window.c
@@ -39,19 +39,12 @@ static int get_sign(float x, float y);
 static uint _screenId = 0;
 
 // surface representing the Sun.
-static surface_t * _sun = NULL;
+static surface_t * _sun;
 
 // surface array representing 8 planets + pluto (dwarf planet).
-static surface_t * _planet[9] = { 	NULL, NULL, NULL,
-									NULL, NULL, NULL,
-									NULL, NULL, NULL };
-
+static surface_t * _planet[9]; 
 // surface array representing 18 moons of the planets.
-static surface_t * _moon[18] = {NULL, NULL, NULL, NULL,
-								NULL, NULL, NULL, NULL,
-								NULL, NULL, NULL, NULL,
-								NULL, NULL, NULL, NULL,
-								NULL, NULL};
+static surface_t * _moon[18];
 
 /* des variable d'états pour activer/désactiver des options de rendu */
 static int _use_tex = 1, _use_color = 0, _use_lighting = 1;
@@ -82,7 +75,7 @@ static float _s = 1.0f; // multiplier for angle (for speeding planets movement a
 static float _a = 0.0f; // rotation angle.
 static float _r = 0.0f; // -//-
 
-static Mix_Chunk * bsound = NULL; // background sound.
+static Mix_Chunk * bsound; // background sound.
 
 /*!\brief paramètre l'application et lance la boucle infinie. */
 int main(int argc, char ** argv) {