diff --git a/can/bus.py b/can/bus.py
index <HASH>..<HASH> 100644
--- a/can/bus.py
+++ b/can/bus.py
@@ -92,8 +92,7 @@ class BusABC(object):
         raise NotImplementedError("Trying to set_filters on unsupported bus")
 
     def flush_tx_buffer(self):
-        """Used for CAN interfaces which need to flush their transmit buffer.
-
+        """Discard every message that may be queued in the output buffer(s).
         """
         pass
 
diff --git a/can/interfaces/kvaser/canlib.py b/can/interfaces/kvaser/canlib.py
index <HASH>..<HASH> 100644
--- a/can/interfaces/kvaser/canlib.py
+++ b/can/interfaces/kvaser/canlib.py
@@ -411,8 +411,7 @@ class KvaserBus(BusABC):
                 canSetAcceptanceFilter(handle, can_id, can_mask, ext)
 
     def flush_tx_buffer(self):
-        """
-        Flushes the transmit buffer on the Kvaser
+        """ Wipeout the transmit buffer on the Kvaser.
         """
         canIoCtl(self._write_handle, canstat.canIOCTL_FLUSH_TX_BUFFER, 0, 0)
Clarify docs about the meaning of flush_tx_buffer, closes #<I>