diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index edfef43..165a809 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -316,7 +316,7 @@
 syn keyword	vimUserAttrbKey   contained	bar	ban[g]	cou[nt]	ra[nge] com[plete]	n[args]	re[gister]
 syn keyword	vimUserAttrbCmplt contained	augroup buffer behave color command compiler cscope dir environment event expression file file_in_path filetype function help highlight history locale mapping menu option packadd shellcmd sign syntax syntime tag tag_listfiles user var
 syn keyword	vimUserAttrbCmplt contained	custom customlist nextgroup=vimUserAttrbCmpltFunc,vimUserCmdError
-syn match	vimUserAttrbCmpltFunc contained	",\%([sS]:\|<[sS][iI][dD]>\)\=\%(\h\w*\%(#\h\w*\)\+\|\h\w*\)"hs=s+1 nextgroup=vimUserCmdError
+syn match	vimUserAttrbCmpltFunc contained	",\%([sS]:\|<[sS][iI][dD]>\)\=\%(\h\w*\%([.#]\h\w*\)\+\|\h\w*\)"hs=s+1 nextgroup=vimUserCmdError
 
 syn case match
 syn match	vimUserAttrbCmplt contained	"custom,\u\w*"