diff --git a/src/models/prescription.model.ts b/src/models/prescription.model.ts
index 70e0d63..ce5929e 100644
--- a/src/models/prescription.model.ts
+++ b/src/models/prescription.model.ts
@@ -30,7 +30,13 @@ const prescriptionSchema = new Schema({
     dispensedAt: { type: Date },
     supplies: [{
         _id: false,
-        supply: supplySchema,
+        supply: {
+            ...supplySchema.obj,
+            type: {
+                type: String,
+                enum: ['device', 'nutrition', 'magistral']
+            },
+        },
         quantity: Number,
         quantityPresentation: Number,
         diagnostic: {
diff --git a/src/models/supply.model.ts b/src/models/supply.model.ts
index b462694..9ea3113 100644
--- a/src/models/supply.model.ts
+++ b/src/models/supply.model.ts
@@ -11,7 +11,7 @@ export const supplySchema = new Schema({
   activePrinciple: {
     type: String
   },
-  pharmaceutical_form:{
+  pharmaceutical_form: {
     type: String
   },
   power: {
@@ -32,7 +32,7 @@ export const supplySchema = new Schema({
     fsn: String,
     semanticTag: String
   }
-},{
+}, {
   timestamps: true
 });