diff --git a/TM1py/Objects/Cube.py b/TM1py/Objects/Cube.py
index ed5335b5..33ffe60f 100644
--- a/TM1py/Objects/Cube.py
+++ b/TM1py/Objects/Cube.py
@@ -112,7 +112,7 @@ def _construct_body(self) -> str:
         body_as_dict['Dimensions@odata.bind'] = [format_url("Dimensions('{}')", dimension)
                                                  for dimension
                                                  in self.dimensions]
-        if str(self.rules):
+        if self.has_rules:
             body_as_dict['Rules'] = str(self.rules)
         return json.dumps(body_as_dict, ensure_ascii=False)
 
diff --git a/TM1py/Objects/Rules.py b/TM1py/Objects/Rules.py
index 662bd523..7a34ab15 100644
--- a/TM1py/Objects/Rules.py
+++ b/TM1py/Objects/Rules.py
@@ -92,3 +92,8 @@ def __iter__(self):
 
     def __str__(self):
         return self.text
+
+    def __bool__(self):
+        if len(self.text):
+            return True
+        return False