diff --git a/boards/arm/kinetis/freedom-k28f/src/k28_usbhshost.c b/boards/arm/kinetis/freedom-k28f/src/k28_usbhshost.c
index f10e3218a43..6e109c88515 100644
--- a/boards/arm/kinetis/freedom-k28f/src/k28_usbhshost.c
+++ b/boards/arm/kinetis/freedom-k28f/src/k28_usbhshost.c
@@ -377,7 +377,7 @@ static void usb_msc_disconnect(void *arg)
 
       else
         {
-          ferr("ERROR: Unmount failed: %d\n", errcode);
+          ferr("ERROR: Unmount failed: %d\n", ret);
         }
     }
 }