diff --git a/runtime/autoload/dist/man.vim b/runtime/autoload/dist/man.vim
index 315636a..7f7d137 100644
--- a/runtime/autoload/dist/man.vim
+++ b/runtime/autoload/dist/man.vim
@@ -196,7 +196,7 @@
 
   " Emulate piping the buffer through the "col -b" command.
   " Ref: https://github.com/vim/vim/issues/12301
-  silent! keepjumps keeppatterns %s/\v(.)\b\ze\1?//ge
+  exe 'silent! keepjumps keeppatterns %s/\v(.)\b\ze\1?//e' .. (&gdefault ? '' : 'g')
 
   if unsetwidth
     let $MANWIDTH = ''