diff --git a/plugin/bullets.vim b/plugin/bullets.vim
index 4be95d6..84908c6 100644
--- a/plugin/bullets.vim
+++ b/plugin/bullets.vim
@@ -585,7 +585,8 @@ command! InsertNewBullet call <SID>insert_new_bullet()
 " Helper for Colon Indent
 "   returns 1 if current line ends in a colon, else 0
 fun! s:line_ends_in_colon(lnum)
-  return getline(a:lnum)[strlen(getline(a:lnum))-1:] ==# ':'
+  let l:last_char_nr = strgetchar(getline(a:lnum), strcharlen(getline(a:lnum))-1)
+  return l:last_char_nr == 65306 || l:last_char_nr == 58
 endfun
 " --------------------------------------------------------- }}}
 
diff --git a/spec/nested_bullets_spec.rb b/spec/nested_bullets_spec.rb
index a20b44e..7cdc97a 100644
--- a/spec/nested_bullets_spec.rb
+++ b/spec/nested_bullets_spec.rb
@@ -593,6 +593,33 @@
           \ti. this bullet is indented
           \tii. this bullet is also indented
       TEXT
+
+      write_file(filename, <<-TEXT)
+          # Hello there
+          a. this is the first bullet
+      TEXT
+
+      vim.command 'let g:bullets_auto_indent_after_colon = 1'
+      vim.edit filename
+      vim.feedkeys '\<ESC>'
+      vim.type 'GA'
+      vim.feedkeys '\<cr>'
+      vim.type 'this is the second bullet that ends with fullwidth colon：'
+      vim.feedkeys '\<cr>'
+      vim.type 'this bullet is indented'
+      vim.feedkeys '\<cr>'
+      vim.type 'this bullet is also indented'
+      vim.write
+
+      file_contents = IO.read(filename)
+
+      expect(file_contents.strip).to eq normalize_string_indent(<<-TEXT)
+          # Hello there
+          a. this is the first bullet
+          b. this is the second bullet that ends with fullwidth colon：
+          \ti. this bullet is indented
+          \tii. this bullet is also indented
+      TEXT
     end
   end
 end