diff --git a/src/models/tanks.js b/src/models/tanks.js
index 7ab93b34..44c86290 100644
--- a/src/models/tanks.js
+++ b/src/models/tanks.js
@@ -23,7 +23,7 @@ const tanksSchema = new mongoose.Schema({
     motor_status: { type: String, default: 0 },
     connections: {
         source: { type: String},
-        inputConnections: [{ inputConnections: String,input_type:String,motor_status:String }],
+        inputConnections: [{ inputConnections: String,input_type:String,motor_status: { type: String, default: "0" } }],
         outputConnections: [{ outputConnections: String,output_type:String }]
     }