diff --git a/bash_completion b/bash_completion
index 4831c48b..d14d0af3 100644
--- a/bash_completion
+++ b/bash_completion
@@ -120,7 +120,8 @@ complete -f -X '!*.po' poedit gtranslator kbabel lokalize
 complete -f -X '!*.@([Pp][Rr][Gg]|[Cc][Ll][Pp])' harbour gharbour hbpp
 complete -f -X '!*.[Hh][Rr][Bb]' hbrun
 complete -f -X '!*.ly' lilypond ly2dvi
-complete -f -X '!*.@(dif?(f)|?(d)patch)' cdiff kompare
+complete -f -X '!*.@(dif?(f)|?(d)patch)?(.@([gx]z|bz2|lzma))' cdiff
+complete -f -X '!*.@(dif?(f)|?(d)patch)' kompare
 # FINISH exclude -- do not remove this line
 
 # start of section containing compspecs that can be handled within bash