diff --git a/targets/mbedos5/mbed_app.json b/targets/mbedos5/mbed_app.json
index 67a1c8ccd..6698355df 100644
--- a/targets/mbedos5/mbed_app.json
+++ b/targets/mbedos5/mbed_app.json
@@ -3,5 +3,6 @@
         "NRF52_DK": {
             "target.uart_hwfc": 0
         }
-    }
+    },
+    "macros": ["JERRY_JS_PARSER"]
 }