diff --git a/srcs/edmunds_karp.c b/srcs/edmunds_karp.c
index 1b2dc97..d00442d 100644
--- a/srcs/edmunds_karp.c
+++ b/srcs/edmunds_karp.c
@@ -6,7 +6,7 @@
 /*   By: tmaze <tmaze@student.42.fr>                +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2019/03/28 16:21:19 by tmaze             #+#    #+#             */
-/*   Updated: 2019/04/05 15:13:53 by tmaze            ###   ########.fr       */
+/*   Updated: 2019/04/07 12:50:24 by tmaze            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -20,16 +20,19 @@ static void		update_weights(t_lmdata *data, t_bfs *tab, int end_ind)
 	i = end_ind;
 	while (i != -1)
 	{
-		it = data->adj[tab[i].parent];
-		while (it && it->index != i)
-			it = it->next;
-		if (it && it->index == i)
-			it->weight--;
-		it = data->adj[i];
-		while (it && it->index != tab[i].parent)
-			it = it->next;
-		if (it && it->index == tab[i].parent)
-			it->weight++;
+		if (tab[i].parent != -1)
+		{
+			it = data->adj[tab[i].parent];
+			while (it && it->index != i)
+				it = it->next;
+			if (it && it->index == i)
+				it->weight--;
+			it = data->adj[i];
+			while (it && it->index != tab[i].parent)
+				it = it->next;
+			if (it && it->index == tab[i].parent)
+				it->weight++;
+		}
 		i = tab[i].parent;
 	}
 }