diff --git a/pxtarget.json b/pxtarget.json
index f422961a..50d87560 100644
--- a/pxtarget.json
+++ b/pxtarget.json
@@ -32,7 +32,6 @@
         "deployDrives": "MINI",
         "driveName": "MINI",
         "hexMimeType": "application/x-microbit-hex",
-        "moveHexEof": true,
         "openocdScript": "source [find interface/cmsis-dap.cfg]; source [find target/nrf51.cfg]",
         "flashUsableEnd": 242688,
         "flashEnd": 242688,
diff --git a/targetconfig.json b/targetconfig.json
index d67a2434..4120d635 100644
--- a/targetconfig.json
+++ b/targetconfig.json
@@ -143,6 +143,7 @@
             "MKleinSB/pxt-mpr121",
             "MKleinSB/pxt-gatorlog-calliope",
             "MKleinSB/pxt-callibot",
+            "MKleinSB/pxt-serialmp3",
             "dl1ekm/pxt-calliope-ADS1x15",
             "dl1ekm/pxt-calliope-PCF85063-RTC"
         ]