diff --git a/graph.c b/graph.c
index b24d04c406..640433166b 100644
--- a/graph.c
+++ b/graph.c
@@ -801,10 +801,10 @@ static int graph_draw_octopus_merge(struct git_graph *graph,
 	int num_dashes =
 		((graph->num_parents - dashless_commits) * 2) - 1;
 	for (i = 0; i < num_dashes; i++) {
-		col_num = (i / 2) + dashless_commits;
+		col_num = (i / 2) + dashless_commits + graph->commit_index;
 		strbuf_write_column(sb, &graph->new_columns[col_num], '-');
 	}
-	col_num = (i / 2) + dashless_commits;
+	col_num = (i / 2) + dashless_commits + graph->commit_index;
 	strbuf_write_column(sb, &graph->new_columns[col_num], '.');
 	return num_dashes + 1;
 }