diff --git a/ironic/api/controllers/v1/types.py b/ironic/api/controllers/v1/types.py
index 5973e7015b..cba7f2c03f 100644
--- a/ironic/api/controllers/v1/types.py
+++ b/ironic/api/controllers/v1/types.py
@@ -16,9 +16,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import re
-import six
-
 import wsme
 from wsme import types as wtypes
 
@@ -69,57 +66,11 @@ macaddress = MacAddressType()
 uuid = UuidType()
 
 
-# TODO(lucasagomes): WSME already has this StringType implementation on trunk,
-#                    so remove it on the next WSME release (> 0.5b6)
-class StringType(wtypes.UserType):
-    """A simple string type. Can validate a length and a pattern.
-
-    :param min_length: Possible minimum length
-    :param max_length: Possible maximum length
-    :param pattern: Possible string pattern
-
-    Example::
-
-    Name = StringType(min_length=1, pattern='^[a-zA-Z ]*$')
-
-    """
-    basetype = six.string_types
-    name = "string"
-
-    def __init__(self, min_length=None, max_length=None, pattern=None):
-        self.min_length = min_length
-        self.max_length = max_length
-        if isinstance(pattern, six.string_types):
-            self.pattern = re.compile(pattern)
-        else:
-            self.pattern = pattern
-
-    def validate(self, value):
-        if not isinstance(value, self.basetype):
-            error = 'Value should be string'
-            raise ValueError(error)
-
-        if self.min_length is not None and len(value) < self.min_length:
-            error = 'Value should have a minimum character requirement of %s' \
-                    % self.min_length
-            raise ValueError(error)
-
-        if self.max_length is not None and len(value) > self.max_length:
-            error = 'Value should have a maximum character requirement of %s' \
-                    % self.max_length
-            raise ValueError(error)
-
-        if self.pattern is not None and not self.pattern.match(value):
-            error = 'Value should match the pattern %s' % self.pattern.pattern
-            raise ValueError(error)
-
-        return value
-
-
 class JsonPatchType(wtypes.Base):
     """A complex type that represents a single json-patch operation."""
 
-    path = wtypes.wsattr(StringType(pattern='^(/[\w-]+)+$'), mandatory=True)
+    path = wtypes.wsattr(wtypes.StringType(pattern='^(/[\w-]+)+$'),
+                         mandatory=True)
     op = wtypes.wsattr(wtypes.Enum(str, 'add', 'replace', 'remove'),
                        mandatory=True)
     value = wtypes.text
diff --git a/ironic/tests/api/test_types.py b/ironic/tests/api/test_types.py
index bf9ac3de7f..79bb3f37a7 100644
--- a/ironic/tests/api/test_types.py
+++ b/ironic/tests/api/test_types.py
@@ -16,8 +16,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import re
-
 import mock
 import six
 import webtest
@@ -55,35 +53,6 @@ class TestUuidType(base.FunctionalTest):
                           types.UuidType.validate, 'invalid-uuid')
 
 
-# TODO(lucasagomes): The tests for the StringType class were ported from
-#                    WSME trunk remove it on the next WSME release (> 0.5b6)
-class TestStringType(base.FunctionalTest):
-
-    def test_validate_string_type(self):
-        v = types.StringType(min_length=1, max_length=10,
-                             pattern='^[a-zA-Z0-9]*$')
-        v.validate('1')
-        v.validate('12345')
-        v.validate('1234567890')
-        self.assertRaises(ValueError, v.validate, '')
-        self.assertRaises(ValueError, v.validate, '12345678901')
-
-        # Test a pattern validation
-        v.validate('a')
-        v.validate('A')
-        self.assertRaises(ValueError, v.validate, '_')
-
-    def test_validate_string_type_precompile(self):
-        precompile = re.compile('^[a-zA-Z0-9]*$')
-        v = types.StringType(min_length=1, max_length=10,
-                             pattern=precompile)
-
-        # Test a pattern validation
-        v.validate('a')
-        v.validate('A')
-        self.assertRaises(ValueError, v.validate, '_')
-
-
 class MyPatchType(types.JsonPatchType):
     """Helper class for TestJsonPatchType tests."""