diff --git a/isisd/isis_spf.c b/isisd/isis_spf.c
index 36986a19c5..294c03def1 100644
--- a/isisd/isis_spf.c
+++ b/isisd/isis_spf.c
@@ -2908,7 +2908,7 @@ static void show_isis_route_common(struct vty *vty, int levels,
 	struct isis_spftree *spftree;
 	struct listnode *node;
 	struct isis_area *area;
-	char key[8];
+	char key[18];
 
 	if (!isis->area_list || isis->area_list->count == 0)
 		return;
diff --git a/ospfd/ospf_sr.c b/ospfd/ospf_sr.c
index e26fe6f53a..198309c1ef 100644
--- a/ospfd/ospf_sr.c
+++ b/ospfd/ospf_sr.c
@@ -2740,9 +2740,9 @@ static void show_sr_node(struct vty *vty, struct json_object *json,
 			if (srn->algo[i] == SR_ALGORITHM_UNSET)
 				continue;
 			json_obj = json_object_new_object();
-			char tmp[2];
+			char tmp[12];
 
-			snprintf(tmp, sizeof(tmp), "%u", i);
+			snprintf(tmp, sizeof(tmp), "%d", i);
 			json_object_string_add(json_obj, tmp,
 					       srn->algo[i] == SR_ALGORITHM_SPF
 						       ? "SPF"