diff --git a/autopep8.py b/autopep8.py
index 2a2a0672..a7be2665 100755
--- a/autopep8.py
+++ b/autopep8.py
@@ -1384,56 +1384,10 @@ def fix_w504(self, result):
             next_line[next_line_indent:])
 
     def fix_w605(self, result):
-        (line_index, _, target) = get_index_offset_contents(result,
-                                                            self.source)
-        try:
-            tokens = list(generate_tokens(target))
-        except (SyntaxError, tokenize.TokenError):
-            return
-        for (pos, _msg) in get_w605_position(tokens):
-            if target[pos - 1] == "r":
-                # ignore special case
-                if self.options.verbose:
-                    print("invalid line: line_number={}, line: {}".format(
-                        line_index + 1, target))
-                return
-            self.source[line_index] = '{}r{}'.format(
-                target[:pos], target[pos:])
-
-
-def get_w605_position(tokens):
-    """workaround get pointing out position by W605."""
-    # TODO: When this PR(*) change is released, use pos of pycodestyle
-    # *: https://github.com/PyCQA/pycodestyle/pull/747
-    valid = [
-        '\n', '\\', '\'', '"', 'a', 'b', 'f', 'n', 'r', 't', 'v',
-        '0', '1', '2', '3', '4', '5', '6', '7', 'x',
-
-        # Escape sequences only recognized in string literals
-        'N', 'u', 'U',
-    ]
-
-    for token_type, text, start_pos, _end_pos, _line in tokens:
-        if token_type == tokenize.STRING:
-            quote = text[-3:] if text[-3:] in ('"""', "'''") else text[-1]
-            # Extract string modifiers (e.g. u or r)
-            quote_pos = text.index(quote)
-            prefix = text[:quote_pos].lower()
-            start = quote_pos + len(quote)
-            string = text[start:-len(quote)]
-
-            if 'r' not in prefix:
-                pos = string.find('\\')
-                while pos >= 0:
-                    pos += 1
-                    if string[pos] not in valid:
-                        yield (
-                            # No need to search line, token stores position
-                            start_pos[1],
-                            "W605 invalid escape sequence '\\%s'" %
-                            string[pos],
-                        )
-                    pos = string.find('\\', pos + 1)
+        (line_index, offset, target) = get_index_offset_contents(result,
+                                                                 self.source)
+        self.source[line_index] = '{}\\{}'.format(
+            target[:offset + 1], target[offset + 1:])
 
 
 def get_module_imports_on_top_of_file(source, import_line_index):
diff --git a/test/test_autopep8.py b/test/test_autopep8.py
index a69808f4..c7ac13f6 100755
--- a/test/test_autopep8.py
+++ b/test/test_autopep8.py
@@ -5037,7 +5037,7 @@ def test_w604_with_multiple_lines(self):
 
     def test_w605_simple(self):
         line = "escape = '\\.jpg'\n"
-        fixed = "escape = r'\\.jpg'\n"
+        fixed = "escape = '\\\\.jpg'\n"
         with autopep8_context(line, options=['--aggressive']) as result:
             self.assertEqual(fixed, result)
 
@@ -5045,24 +5045,24 @@ def test_w605_identical_token(self):
         # ***NOTE***: The --pep8-passes option is required to prevent an infinite loop in
         # the old, failing code. DO NOT REMOVE.
         line = "escape = foo('\\.bar', '\\.kilroy')\n"
-        fixed = "escape = foo(r'\\.bar', r'\\.kilroy')\n"
+        fixed = "escape = foo('\\\\.bar', '\\\\.kilroy')\n"
         with autopep8_context(line, options=['--aggressive', '--pep8-passes', '5']) as result:
             self.assertEqual(fixed, result, "Two tokens get r added")
 
-        line = "escape = foo('\\.bar', r'\\.kilroy')\n"
-        fixed = "escape = foo(r'\\.bar', r'\\.kilroy')\n"
+        line = "escape = foo('\\.bar', '\\\\.kilroy')\n"
+        fixed = "escape = foo('\\\\.bar', '\\\\.kilroy')\n"
         with autopep8_context(line, options=['--aggressive', '--pep8-passes', '5']) as result:
             self.assertEqual(fixed, result, "r not added if already there")
 
         # Test Case to catch bad behavior reported in Issue #449
         line = "escape = foo('\\.bar', '\\.bar')\n"
-        fixed = "escape = foo(r'\\.bar', r'\\.bar')\n"
+        fixed = "escape = foo('\\\\.bar', '\\\\.bar')\n"
         with autopep8_context(line, options=['--aggressive', '--pep8-passes', '5']) as result:
             self.assertEqual(fixed, result)
 
     def test_w605_with_invalid_syntax(self):
         line = "escape = rr'\\.jpg'\n"
-        fixed = "escape = rr'\\.jpg'\n"
+        fixed = "escape = rr'\\\\.jpg'\n"
         with autopep8_context(line, options=['--aggressive']) as result:
             self.assertEqual(fixed, result)