diff --git a/plugins/player_sync/messages.ts b/plugins/player_sync/messages.ts
index 53251537..6799e41c 100644
--- a/plugins/player_sync/messages.ts
+++ b/plugins/player_sync/messages.ts
@@ -60,12 +60,12 @@ const jsonCharacter = Type.Object({
 	character_mining_speed_modifier: Type.Optional(Type.Number({ minimum: -1 })),
 	character_additional_mining_categories: Type.Optional(jsonList(Type.String())),
 	character_running_speed_modifier: Type.Optional(Type.Number({ minimum: -1 })),
-	character_build_distance_bonus: Type.Optional(Type.Number()),
-	character_item_drop_distance_bonus: Type.Optional(Type.Number()),
-	character_reach_distance_bonus: Type.Optional(Type.Number()),
-	character_resource_reach_distance_bonus: Type.Optional(Type.Number()),
-	character_item_pickup_distance_bonus: Type.Optional(Type.Number()),
-	character_loot_pickup_distance_bonus: Type.Optional(Type.Number()),
+	character_build_distance_bonus: Type.Optional(Type.Number({ minimum: 0 })),
+	character_item_drop_distance_bonus: Type.Optional(Type.Number({ minimum: 0 })),
+	character_reach_distance_bonus: Type.Optional(Type.Number({ minimum: 0 })),
+	character_resource_reach_distance_bonus: Type.Optional(Type.Number({ minimum: 0 })),
+	character_item_pickup_distance_bonus: Type.Optional(Type.Number({ minimum: 0 })),
+	character_loot_pickup_distance_bonus: Type.Optional(Type.Number({ minimum: 0 })),
 	character_inventory_slots_bonus: Type.Optional(Type.Integer({ minimum: 0 })),
 	character_trash_slot_count_bonus: Type.Optional(Type.Integer({ minimum: 0 })),
 	character_maximum_following_robot_count_bonus: Type.Optional(Type.Integer({ minimum: 0 })),
diff --git a/plugins/player_sync/test/plugin.js b/plugins/player_sync/test/plugin.js
index 57d7b4a4..123ab9e6 100644
--- a/plugins/player_sync/test/plugin.js
+++ b/plugins/player_sync/test/plugin.js
@@ -124,6 +124,7 @@ describe("player_sync plugin", function() {
 					["shortcuts", { "toggle-personal-roboport": "yes" }],
 					["character", { character_health_bonus: "100" }],
 					["character", { character_inventory_slots_bonus: -1 }],
+					["character", { character_reach_distance_bonus: -1 }],
 					["character", { character_crafting_speed_modifier: -5 }],
 					["quick_bar", { 1: { t: "f", n: "iron-plate", q: "normal", c: "~" } }],
 					["crafting_queue", {}],