diff --git a/src/game.c b/src/game.c
index 8052712..e8e3c98 100644
--- a/src/game.c
+++ b/src/game.c
@@ -13,14 +13,22 @@
 extern bopti_image_t SignAction_img;
 
 
+#define MAX_INTERACTION_DISTANCE    16
+
+
 void game_logic(Game *game) {
 
     /* we check if interactions are possible close to the player */
     for( int i=0; i<game->map_level->nbextradata; i++ )
     {
         /* simple distance check along X and Y axis */
-        if ( (abs((int) game->player.x - (int) game->map_level->extradata[i].x*PXSIZE) < 8*PXSIZE) 
-            && (abs((int) game->player.y - (int) game->map_level->extradata[i].y*PXSIZE) < 8*PXSIZE))
+        /* Be careful to use world coordinates, not local (i.e.map) ones */
+        if  ( (abs((int) game->player.wx - 
+                   (int) game->map_level->extradata[i].x*PXSIZE )
+                   < MAX_INTERACTION_DISTANCE*PXSIZE) 
+           && (abs((int) game->player.wy -
+                   (int) game->map_level->extradata[i].y*PXSIZE )
+                   < MAX_INTERACTION_DISTANCE*PXSIZE)  )
         {
             /* the player can do something */
             game->player.canDoSomething = true;