diff --git a/pymavlink b/pymavlink
index aa033552599..66ba6137b88 160000
--- a/pymavlink
+++ b/pymavlink
@@ -1 +1 @@
-Subproject commit aa033552599c981b3e916b42383de8a21754c9b4
+Subproject commit 66ba6137b88da6528568ca48fb8b33d8310b9491