diff --git a/util/secscan/api.py b/util/secscan/api.py
index d07e9de81..5efdafb92 100644
--- a/util/secscan/api.py
+++ b/util/secscan/api.py
@@ -1,4 +1,3 @@
-import os
 import logging
 
 from abc import ABCMeta, abstractmethod
@@ -12,7 +11,7 @@ from flask import url_for
 from data.database import CloseForLongOperation
 from data import model
 from data.model.storage import get_storage_locations
-from util import get_app_url
+from util import get_app_url, slash_join
 from util.abchelpers import nooper
 from util.failover import failover, FailoverException
 from util.secscan.validator import SecurityConfigValidator
@@ -24,7 +23,7 @@ TOKEN_VALIDITY_LIFETIME_S = 60  # Amount of time the security scanner has to cal
 
 UNKNOWN_PARENT_LAYER_ERROR_MSG = 'worker: parent layer is unknown, it must be processed first'
 
-MITM_CERT_PATH = os.path.join(CONF_DIR, '/mitm.cert')
+MITM_CERT_PATH = slash_join(CONF_DIR, 'mitm.cert')
 
 DEFAULT_HTTP_HEADERS = {'Connection': 'close'}