diff --git a/src/packets.c b/src/packets.c
index 11b3119..b1f3c5a 100644
--- a/src/packets.c
+++ b/src/packets.c
@@ -615,7 +615,7 @@ do_bombdata (struct pkg_bombdata *b_dat, _net_addr * addr)
     if (bomb->state != BS_ticking)
         bomb->to = b_dat->to;
     else
-        bman.bfield[bomb->pos.x][bomb->pos.y] = 1; // keep the bfield up to date
+        bman.bfield[bomb->pos.x >> 8][bomb->pos.y >> 8] = 1; // keep the bfield up to date
     bomb->r = b_dat->r;
     bomb->ex_nr = b_dat->ex_nr;
     bomb->state = b_dat->state;