diff --git a/glanceclient/common/utils.py b/glanceclient/common/utils.py
index 4aec25de..9d106c6d 100644
--- a/glanceclient/common/utils.py
+++ b/glanceclient/common/utils.py
@@ -48,7 +48,7 @@ def schema_args(schema_getter, omit=[]):
     typemap = {
         'string': str,
         'integer': int,
-        'boolean': string_to_bool,
+        'boolean': strutils.bool_from_string,
         'array': list
     }
 
@@ -176,10 +176,6 @@ def is_authentication_required(f):
     return getattr(f, 'require_authentication', True)
 
 
-def string_to_bool(arg):
-    return arg.strip().lower() in ('t', 'true', 'yes', '1')
-
-
 def env(*vars, **kwargs):
     """Search for the first defined of possibly many env vars
 
diff --git a/glanceclient/v1/images.py b/glanceclient/v1/images.py
index 51caa010..374eacd3 100644
--- a/glanceclient/v1/images.py
+++ b/glanceclient/v1/images.py
@@ -70,7 +70,7 @@ class ImageManager(base.Manager):
 
         for key in ['is_public', 'protected', 'deleted']:
             if key in meta:
-                meta[key] = utils.string_to_bool(meta[key])
+                meta[key] = strutils.bool_from_string(meta[key])
 
         return self._format_image_meta_for_user(meta)
 
diff --git a/glanceclient/v1/legacy_shell.py b/glanceclient/v1/legacy_shell.py
index 77e43721..c7121d53 100644
--- a/glanceclient/v1/legacy_shell.py
+++ b/glanceclient/v1/legacy_shell.py
@@ -25,6 +25,7 @@ import sys
 import urlparse
 
 from glanceclient.common import utils
+from glanceclient.openstack.common import strutils
 
 
 SUCCESS = 0
@@ -115,9 +116,9 @@ def do_add(gc, args):
         return FAILURE
 
     image_meta = {
-        'is_public': utils.string_to_bool(
+        'is_public': strutils.bool_from_string(
             fields.pop('is_public', 'False')),
-        'protected': utils.string_to_bool(
+        'protected': strutils.bool_from_string(
             fields.pop('protected', 'False')),
         'min_disk': fields.pop('min_disk', 0),
         'min_ram': fields.pop('min_ram', 0),
@@ -208,9 +209,11 @@ def do_update(gc, args):
 
     # Have to handle "boolean" values specially...
     if 'is_public' in fields:
-        image_meta['is_public'] = utils.string_to_bool(fields.pop('is_public'))
+        image_meta['is_public'] = strutils.\
+            bool_from_string(fields.pop('is_public'))
     if 'protected' in fields:
-        image_meta['protected'] = utils.string_to_bool(fields.pop('protected'))
+        image_meta['protected'] = strutils.\
+            bool_from_string(fields.pop('protected'))
 
     # Add custom attributes, which are all the arguments remaining
     image_meta['properties'] = fields
diff --git a/glanceclient/v1/shell.py b/glanceclient/v1/shell.py
index 00422c50..0c685f84 100644
--- a/glanceclient/v1/shell.py
+++ b/glanceclient/v1/shell.py
@@ -61,7 +61,8 @@ DISK_FORMATS = ('Acceptable formats: ami, ari, aki, vhd, vmdk, raw, '
 @utils.arg('--sort-dir', default='asc',
            choices=glanceclient.v1.images.SORT_DIR_VALUES,
            help='Sort image list in specified direction.')
-@utils.arg('--is-public', type=utils.string_to_bool, metavar='{True,False}',
+@utils.arg('--is-public',
+           type=strutils.bool_from_string, metavar='{True,False}',
            help=('Allows the user to select a listing of public or non '
                  'public images.'))
 @utils.arg('--owner', default=None, metavar='<TENANT_ID>',
@@ -192,9 +193,11 @@ def do_image_download(gc, args):
 # to use --is-public
 @utils.arg('--public', action='store_true', default=False,
            help=argparse.SUPPRESS)
-@utils.arg('--is-public', type=utils.string_to_bool, metavar='{True,False}',
+@utils.arg('--is-public',
+           type=strutils.bool_from_string, metavar='{True,False}',
            help='Make image accessible to the public.')
-@utils.arg('--is-protected', type=utils.string_to_bool, metavar='{True,False}',
+@utils.arg('--is-protected',
+           type=strutils.bool_from_string, metavar='{True,False}',
            help='Prevent image from being deleted.')
 @utils.arg('--property', metavar="<key=value>", action='append', default=[],
            help=("Arbitrary property to associate with image. "
@@ -264,9 +267,11 @@ def do_image_create(gc, args):
            help=('Similar to \'--location\' in usage, but this indicates that'
                  ' the Glance server should immediately copy the data and'
                  ' store it in its configured image store.'))
-@utils.arg('--is-public', type=utils.string_to_bool, metavar='{True,False}',
+@utils.arg('--is-public',
+           type=strutils.bool_from_string, metavar='{True,False}',
            help='Make image accessible to the public.')
-@utils.arg('--is-protected', type=utils.string_to_bool, metavar='{True,False}',
+@utils.arg('--is-protected',
+           type=strutils.bool_from_string, metavar='{True,False}',
            help='Prevent image from being deleted.')
 @utils.arg('--property', metavar="<key=value>", action='append', default=[],
            help=("Arbitrary property to associate with image. "