diff --git a/src/server/BreCal/validators/validation_rules.py b/src/server/BreCal/validators/validation_rules.py
index ba808e8..b90f691 100644
--- a/src/server/BreCal/validators/validation_rules.py
+++ b/src/server/BreCal/validators/validation_rules.py
@@ -29,7 +29,7 @@ class ValidationRules(ValidationRuleFunctions):
         returns: (evaluation_state, violations)
         """
         # prepare df_times, which every validation rule tends to use
-        df_times = self.sql_handler.df_dict.get('times') # -> pd.DataFrame
+        df_times = self.sql_handler.df_dict.get('times', pd.DataFrame()) # -> pd.DataFrame
 
         if len(df_times)==0:
             return (StatusFlags.GREEN.value, [])