diff --git a/boards/default_src/micropython/generators/sensor_onboard.js b/boards/default_src/micropython/generators/sensor_onboard.js
index b8628c23..caf0965b 100644
--- a/boards/default_src/micropython/generators/sensor_onboard.js
+++ b/boards/default_src/micropython/generators/sensor_onboard.js
@@ -313,7 +313,7 @@ export const rfid_write = function (_, generator) {
         objName = 'ext_rc522';
     }
     generator.definitions_[`import_${moduleName}_${objName}`] = `from ${moduleName} import ${objName}`;
-    var code = `${objName}.write_card(${cnt}, ${sector})`;
+    var code = `${objName}.write_card(${cnt}, ${sector})\n`;
     return code;
 }