diff --git a/Tools/autotest/blimp.py b/Tools/autotest/blimp.py
index e180ea04882d33..46963e4ac3ffbb 100644
--- a/Tools/autotest/blimp.py
+++ b/Tools/autotest/blimp.py
@@ -16,7 +16,7 @@
 testdir = os.path.dirname(os.path.realpath(__file__))
 SITL_START_LOCATION = mavutil.location(-35.362938, 149.165085, 584, 270)
 
-# Flight mode switch positions are set-up in arducopter.param to be
+# Flight mode switch positions are set-up in arducopter.param to b
 #   switch 1 = Circle
 #   switch 2 = Land
 #   switch 3 = RTL