diff --git a/README.md b/README.md
index 656ceae..9bf2815 100644
--- a/README.md
+++ b/README.md
@@ -183,9 +183,9 @@ in addition to the one for `:EasyAlign` command.
 vnoremap <silent> <Leader><Enter> :LiveEasyAlign<Enter>
 ```
 
-In live interactive mode, you have to type in the same delimiter or regular
-expression again to finalize the alignment. This allows you to preview the
-result of the alignment and freely change the delimiter using backspace key
+In live interactive mode, you have to type in the same delimiter (or `CTRL-X` on
+regular expression) again to finalize the alignment. This allows you to preview
+the result of the alignment and freely change the delimiter using backspace key
 without leaving the interactive mode.
 
 ### Using `EasyAlign` in command line
diff --git a/autoload/easy_align.vim b/autoload/easy_align.vim
index 067b605..61b66a0 100644
--- a/autoload/easy_align.vim
+++ b/autoload/easy_align.vim
@@ -690,16 +690,16 @@ function! s:interactive(range, modes, n, d, opts, rules, vis, live)
         silent! call remove(opts, 'm')
       endif
     elseif ch == "\<C-_>" || ch == "\<C-X>"
-      let pd = regx ? d : ''
+      if a:live && regx && !empty(d)
+        break
+      endif
 
       let prompt = 'Regular expression: '
-      let ch = s:input(prompt, pd, a:vis)
+      let ch = s:input(prompt, '', a:vis)
       if !empty(ch) && s:valid_regexp(ch)
         let regx = 1
         let d = ch
-        if !a:live || pd == d
-          break
-        endif
+        if !a:live | break | endif
       else
         let warn = 'Invalid regular expression: '.ch
       endif
diff --git a/doc/easy_align.txt b/doc/easy_align.txt
index 898ba0e..e8cc732 100644
--- a/doc/easy_align.txt
+++ b/doc/easy_align.txt
@@ -121,10 +121,10 @@ following mapping in addition to the one for `:EasyAlign` command.
 
     vnoremap <silent> <Leader><Enter> :LiveEasyAlign<Enter>
 
-In live interactive mode, you have to type in the same delimiter or
-regular expression again to finalize the alignment. This allows you to
-preview the result of the alignment and freely change the delimiter using
-backspace key without leaving the interactive mode.
+In live interactive mode, you have to type in the same delimiter (or
+`CTRL-X` on regular expression) again to finalize the alignment. This
+allows you to preview the result of the alignment and freely change the
+delimiter using backspace key without leaving the interactive mode.
 
 
 Left/right/center mode switch in interactive mode
diff --git a/test/interactive.vader b/test/interactive.vader
index a917184..76d666f 100644
--- a/test/interactive.vader
+++ b/test/interactive.vader
@@ -508,7 +508,7 @@ Do (live interactive mode!):
   \<C-I>\<C-I>
   \<C-X>|\<Enter>
   \<Enter>
-  \<C-X>\<Enter>
+  \<C-X>
 
 Expect:
    [|]    Option[|]Type   [|]Default[|]Description                                   [|