diff --git a/contrib/vim/ftdetect/bitbake.vim b/contrib/vim/ftdetect/bitbake.vim
index 179e4d9..6822e24 100644
--- a/contrib/vim/ftdetect/bitbake.vim
+++ b/contrib/vim/ftdetect/bitbake.vim
@@ -11,7 +11,7 @@ if &compatible || version < 600
 endif
 
 " .bb and .bbclass
-au BufNewFile,BufRead *.b{b,bclass}	set filetype=bitbake
+au BufNewFile,BufRead *.b{b,bappend,bclass}	set filetype=bitbake
 
 " .inc
 au BufNewFile,BufRead *.inc 		set filetype=bitbake