diff --git a/plugin/foreplay.vim b/plugin/foreplay.vim
index 2832575..d070218 100644
--- a/plugin/foreplay.vim
+++ b/plugin/foreplay.vim
@@ -811,7 +811,7 @@ function! foreplay#ns() abort
   while lnum < line('$') && getline(lnum) =~# '^\s*\%(;.*\)\=$'
     let lnum += 1
   endwhile
-  let ns = matchstr(getline(lnum), '\C^(\s*\%(in-ns\s*''\|ns\s\+\)\zs\k\+\ze')
+  let ns = matchstr(getline(lnum), '\C^(\s*\%(in-ns\s*''\|ns\s\+\)\zs[A-Za-z0-9_?*!+/=<>.-]\+\ze')
   if ns !=# ''
     return ns
   endif