diff --git a/lib/core/common.py b/lib/core/common.py
index 52ea24d12..3e7ea6d00 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -76,8 +76,6 @@ from lib.core.settings import SQLITE_ALIASES
 from lib.core.settings import ACCESS_ALIASES
 from lib.core.settings import FIREBIRD_ALIASES
 
-__compiledRegularExpressions = {}
-
 def paramToDict(place, parameters=None):
     """
     Split the parameters into names and values, check if these parameters
@@ -1305,14 +1303,11 @@ def getCompiledRegex(regex, *args):
     Returns compiled regular expression and stores it in cache for further
     usage
     """
-
-    global __compiledRegularExpressions
-
-    if (regex, args) in __compiledRegularExpressions:
-        return __compiledRegularExpressions[(regex, args)]
+    if (regex, args) in kb.cache.regex:
+        return kb.cache.regex[(regex, args)]
     else:
         retVal = re.compile(regex, *args)
-        __compiledRegularExpressions[(regex, args)] = retVal
+        kb.cache.regex[(regex, args)] = retVal
         return retVal
 
 def getPartRun():
diff --git a/lib/core/option.py b/lib/core/option.py
index bf1967a57..ac80e22a7 100644
--- a/lib/core/option.py
+++ b/lib/core/option.py
@@ -928,6 +928,11 @@ def __setKnowledgeBaseAttributes():
 
     kb.absFilePaths   = set()
     kb.bannerFp       = advancedDict()
+
+    kb.cache          = advancedDict()
+    kb.cache.regex    = {}
+    kb.cache.md5      = {}
+
     kb.commonOutputs  = None
     kb.data           = advancedDict()