diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index f0cada6..4010469 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -41,15 +41,15 @@ GLfloat *buffer_colors_origin = NULL;
 GLuint *buffer_lines_origin = NULL;
 GLuint *buffer_plans_origin = NULL;
 
-volatile int buffer_vertex_size = 0;
-volatile int buffer_lines_size = 0;
-volatile int buffer_colors_size = 0;
-volatile int buffer_plans_size = 0;
+volatile long buffer_vertex_size = 0;
+volatile long buffer_lines_size = 0;
+volatile long buffer_colors_size = 0;
+volatile long buffer_plans_size = 0;
 
-volatile int buffer_vertex_0_arrow = 0;
-volatile int buffer_lines_0_arrow = 0;
-volatile int buffer_colors_0_arrow = 0;
-volatile int buffer_plans_0_arrow = 0;
+volatile long buffer_vertex_0_arrow = 0;
+volatile long buffer_lines_0_arrow = 0;
+volatile long buffer_colors_0_arrow = 0;
+volatile long buffer_plans_0_arrow = 0;
 
 #define TEST 0
 
@@ -673,8 +673,8 @@ static inline int erase_arrow (int arrows_nb, int address,
                                int site, int x, int y, int z,
                                int console)
 {
-    arrows_nb --;
     assert (arrows_nb);
+    arrows_nb --;
 
     int mem = arrows_ptr[address].site;
 
@@ -689,15 +689,13 @@ static inline int erase_arrow (int arrows_nb, int address,
                  : arrows_ptr[%d].site = %d >> %d  (%d is last arrow.site)\n",\
         arrows_nb + 1, arrows_nb, address, address, site, mem, arrows_ptr[address].site, arrows_ptr[arrows_nb].site);
 
-    // Attention : lors de la création des vertex des flèches, tous les vertex centraux sont redondants (au maximum 6)
+    for (long i = 0 + address * 6; i < 6 + address * 6; i++)
+        buffer_vertex_origin [buffer_vertex_0_arrow + i]
+      = buffer_vertex_origin [buffer_vertex_size - 6 + i];
 
-    for (int i = 0 + address * 6; i < 6 + address * 6; i++)
-        buffer_vertex_origin [(long) buffer_vertex_0_arrow + i]
-      = buffer_vertex_origin [(long) buffer_vertex_size - 6 + i];
-
-    for (int i = 0; i < 6; i++)
-        buffer_colors_origin [(long) buffer_colors_0_arrow + (address + 4) * 6 + i]
-      = buffer_colors_origin [(long) buffer_colors_size - 6 + i];
+    for (long i = 0; i < 6; i++)
+        buffer_colors_origin [buffer_colors_0_arrow + (address + 4) * 6 + i]
+      = buffer_colors_origin [buffer_colors_size - 6 + i];
 
     void *new_arrows_vertex_ptr = g_realloc(buffer_vertex_origin, buffer_vertex_size * sizeof(GLfloat));
     if (new_arrows_vertex_ptr) buffer_vertex_origin = new_arrows_vertex_ptr;
@@ -708,9 +706,9 @@ static inline int erase_arrow (int arrows_nb, int address,
     else                       perror("In graphics.erase_arrow(), can't re_allocate for arrows colors buffer.\n");
 
 
-    /* buffer_vertex_size -= 6;    <<<   ceci est fait dans : graphics_write_vertex() */
-    /* buffer_colors_size -= 6;    <<<   ceci est fait dans : graphics_write_colors() */
-    /* buffer_lines_size  -= 2;    <<<   ceci est fait dans : graphics_write_line()   */
+    /* buffer_vertex_size -= 6;   // <<<   ceci est fait dans : graphics_write_vertex() */
+    /* buffer_colors_size -= 6;   // <<<   ceci est fait dans : graphics_write_colors() */
+    /* buffer_lines_size  -= 2;   // <<<   ceci est fait dans : graphics_write_line() */
 
     /*  Il ne faut pas réécrire ce qui suit: ces lignes dessinent maintenant à partir d'autres vertex */
     /* void *new_arrows_lines_ptr = g_realloc(buffer_lines_origin, buffer_lines_size * sizeof(GLfloat)); */