diff --git a/autoload/emmet.vim b/autoload/emmet.vim
index 799e8fc..1ad520a 100644
--- a/autoload/emmet.vim
+++ b/autoload/emmet.vim
@@ -303,7 +303,7 @@ function! emmet#toString(...) abort
         let inner = current.value[1:-2]
       endif
       let inner = substitute(inner, "\n", "\n" . indent, 'g')
-      let str = substitute(str, '\${\(\w\+\)}', '\=s:localvar(current, submatch(1))', '')
+      let str = substitute(str, '\${:\(\w\+\)}', '\=s:localvar(current, submatch(1))', '')
       let str = substitute(str, '\${child}', inner, '')
     endif
     let itemno = itemno + 1