+#if USE_DROP_BUGFIX
+ /* do not drop an element on top of another element; when holding drop key
+ pressed without moving, dropped element must move away before the next
+ element can be dropped (this is especially important if the next element
+ is dynamite, which can be placed on background for historical reasons) */
+ if (PLAYER_DROPPING(player, dropx, dropy) && Feld[dropx][dropy] != EL_EMPTY)
+ return MF_ACTION;
+#endif
+