diff --git a/lib/irb/ruby-lex.rb b/lib/irb/ruby-lex.rb
index b4c31c16fe5ccc..0a5e2c45b6d42d 100644
--- a/lib/irb/ruby-lex.rb
+++ b/lib/irb/ruby-lex.rb
@@ -317,11 +317,13 @@ def process_nesting_level
 
   def check_newline_depth_difference
     depth_difference = 0
+    open_brace_on_line = 0
     @tokens.each_with_index do |t, index|
       case t[1]
       when :on_ignored_nl, :on_nl, :on_comment
         if index != (@tokens.size - 1)
           depth_difference = 0
+          open_brace_on_line = 0
         end
         next
       when :on_sp
@@ -330,8 +332,9 @@ def check_newline_depth_difference
       case t[1]
       when :on_lbracket, :on_lbrace, :on_lparen
         depth_difference += 1
+        open_brace_on_line += 1
       when :on_rbracket, :on_rbrace, :on_rparen
-        depth_difference -= 1
+        depth_difference -= 1 if open_brace_on_line > 0
       when :on_kw
         next if index > 0 and @tokens[index - 1][3].allbits?(Ripper::EXPR_FNAME)
         case t[2]
diff --git a/test/irb/test_ruby_lex.rb b/test/irb/test_ruby_lex.rb
index f3a9b30e954012..ae25b1d501cdaf 100644
--- a/test/irb/test_ruby_lex.rb
+++ b/test/irb/test_ruby_lex.rb
@@ -73,7 +73,22 @@ def test_auto_indent
       lines = []
       input_with_correct_indents.each do |row|
         lines << row.content
+        assert_indenting(lines, row.current_line_spaces, false)
+        assert_indenting(lines, row.new_line_spaces, true)
+      end
+    end
 
+    def test_braces_on_thier_own_line
+      input_with_correct_indents = [
+        Row.new(%q(if true), nil, 2),
+        Row.new(%q(  [), nil, 4),
+        Row.new(%q(  ]), 2, 2),
+        Row.new(%q(end), 0, 0),
+      ]
+
+      lines = []
+      input_with_correct_indents.each do |row|
+        lines << row.content
         assert_indenting(lines, row.current_line_spaces, false)
         assert_indenting(lines, row.new_line_spaces, true)
       end