diff --git a/nova/api/openstack/compute/schemas/flavor_manage.py b/nova/api/openstack/compute/schemas/flavor_manage.py
index a035ed1bd0c2..08899a21eee1 100644
--- a/nova/api/openstack/compute/schemas/flavor_manage.py
+++ b/nova/api/openstack/compute/schemas/flavor_manage.py
@@ -15,7 +15,6 @@
 import copy
 
 from nova.api.validation import parameter_types
-from nova.db import api as db
 
 create = {
     'type': 'object',
@@ -42,7 +41,9 @@ create = {
                     'type': ['number', 'string'],
                     'pattern': '^[0-9]+(\.[0-9]+)?$',
                     'minimum': 0, 'exclusiveMinimum': True,
-                    'maximum': db.SQL_SP_FLOAT_MAX
+                    # maximum's value is limited to db constant's
+                    # SQL_SP_FLOAT_MAX (in nova/db/constants.py)
+                    'maximum': 3.40282e+38
                 },
                 'os-flavor-access:is_public': parameter_types.boolean,
             },
diff --git a/nova/api/openstack/compute/schemas/quota_sets.py b/nova/api/openstack/compute/schemas/quota_sets.py
index 549617ad7d87..1942488ac251 100644
--- a/nova/api/openstack/compute/schemas/quota_sets.py
+++ b/nova/api/openstack/compute/schemas/quota_sets.py
@@ -15,14 +15,15 @@
 import copy
 
 from nova.api.validation import parameter_types
-from nova.db import api as db
 
 common_quota = {
     'type': ['integer', 'string'],
     'pattern': '^-?[0-9]+$',
     # -1 is a flag value for unlimited
     'minimum': -1,
-    'maximum': db.MAX_INT
+    # maximum's value is limited to db constant's MAX_INT
+    # (in nova/db/constants.py)
+    'maximum': 0x7FFFFFFF
 }
 
 quota_resources = {
diff --git a/nova/api/validation/parameter_types.py b/nova/api/validation/parameter_types.py
index 49d84f780100..8c54c1993d58 100644
--- a/nova/api/validation/parameter_types.py
+++ b/nova/api/validation/parameter_types.py
@@ -21,7 +21,6 @@ import unicodedata
 
 import six
 
-from nova.db import api as db
 from nova.i18n import _
 from nova.objects import tag
 
@@ -427,7 +426,9 @@ volume_size = {
     'type': ['integer', 'string'],
     'pattern': '^[0-9]+$',
     'minimum': 1,
-    'maximum': db.MAX_INT
+    # maximum's value is limited to db constant's MAX_INT
+    # (in nova/db/constants.py)
+    'maximum': 0x7FFFFFFF
 }
 
 disk_config = {