diff --git a/lib/core/settings.py b/lib/core/settings.py
index c9c4ef4f4..15745459b 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 = "1.7.12.6"
+VERSION = "1.7.12.7"
 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)
diff --git a/lib/techniques/blind/inference.py b/lib/techniques/blind/inference.py
index 52bea1163..67c639d94 100644
--- a/lib/techniques/blind/inference.py
+++ b/lib/techniques/blind/inference.py
@@ -736,7 +736,7 @@ def queryOutputLength(expression, payload):
     debugMsg = "performed %d quer%s in %.2f seconds" % (count, 'y' if count == 1 else "ies", calculateDeltaSeconds(start))
     logger.debug(debugMsg)
 
-    if length == " ":
+    if isinstance(length, six.string_types) and length.isspace():
         length = 0
 
     return length