diff --git a/components/belonging/belongingModel.js b/components/belonging/belongingModel.js
index f3faa91..b625dcc 100644
--- a/components/belonging/belongingModel.js
+++ b/components/belonging/belongingModel.js
@@ -13,6 +13,10 @@ const belongingSchema = new mongoose.Schema(
             type: ObjectID,
             ref: 'Category',
         },
+        unit: {
+            type: String,
+            required: true,
+        },
         description: String,
         relatedProjects: [String],
         location: {