diff --git a/lib/core/common.py b/lib/core/common.py
index 45a8dfd40..4ea6f7a46 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -590,7 +590,7 @@ class Backend(object):
     def isVersionGreaterOrEqualThan(version):
         retVal = False
 
-        if Backend.getVersion() is not None and version is not None:
+        if all(_ not in (None, UNKNOWN_DBMS_VERSION) for _ in (Backend.getVersion(), version)):
             _version = unArrayizeValue(Backend.getVersion())
             _version = re.sub(r"[<>= ]", "", _version)
 
diff --git a/lib/core/settings.py b/lib/core/settings.py
index 75bc7e9e6..d1b1f41bf 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -20,7 +20,7 @@ from thirdparty import six
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.6.6.9"
+VERSION = "1.6.6.10"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)