diff --git a/mvt/common/indicators.py b/mvt/common/indicators.py
index ec1c6f8..5ae0fc6 100644
--- a/mvt/common/indicators.py
+++ b/mvt/common/indicators.py
@@ -57,7 +57,7 @@ class Indicators:
             else:
                 self.log.info("Invalid STIX2 path %s in MVT_STIX2 environment variable", path)
 
-    def load_indicators_files(self, files):
+    def load_indicators_files(self, files=[]):
         """
         Load a list of indicators files.
         """