diff --git a/bash_completion b/bash_completion
index e522898b..383d23ee 100644
--- a/bash_completion
+++ b/bash_completion
@@ -446,6 +446,8 @@ _pnames()
 	# containing "/" specially unless -r is given so that wouldn't quite
 	# work either. Perhaps it'd be best to not complete these to anything
 	# for now.
+	# Not using "ps axo comm" because under some Linux kernels, it
+	# truncates command names (see e.g. http://bugs.debian.org/497540#19)
 	COMPREPLY=( $( compgen -W '$( command ps axo command | \
 			           sed -e "1d; s/ .*//; s:.*/::; s/:$//;" \
 			               -e "s/^[[(-]//; s/[])]$//" \