diff --git a/dronekit/mavlink.py b/dronekit/mavlink.py
index c60b0d90e..454882dc2 100644
--- a/dronekit/mavlink.py
+++ b/dronekit/mavlink.py
@@ -52,9 +52,9 @@ def __init__(self, ip, baud=115200, target_system=0, source_system=255, use_nati
         # Monkey-patch MAVLink object for fix_targets.
         sendfn = self.master.mav.send
 
-        def newsendfn(mavmsg):
+        def newsendfn(mavmsg, **kwargs):
             self.fix_targets(mavmsg)
-            return sendfn(mavmsg)
+            return sendfn(mavmsg, kwargs)
 
         self.master.mav.send = newsendfn