diff --git a/lib/core/option.py b/lib/core/option.py
index 6501d32c7..065c8c7fe 100644
--- a/lib/core/option.py
+++ b/lib/core/option.py
@@ -1159,7 +1159,7 @@ def _setSafeVisit():
             else:
                 conf.safeUrl = "http://" + conf.safeUrl
 
-    if conf.safeFreq <= 0:
+    if (conf.safeFreq or 0) <= 0:
         errMsg = "please provide a valid value (>0) for safe frequency (--safe-freq) while using safe visit features"
         raise SqlmapSyntaxException(errMsg)
 
diff --git a/lib/core/settings.py b/lib/core/settings.py
index 595af68ff..dcdd13c34 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.3.6.41"
+VERSION = "1.3.6.42"
 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)