diff --git a/pycardano/txbuilder.py b/pycardano/txbuilder.py
index 52a0f989..efe2058c 100644
--- a/pycardano/txbuilder.py
+++ b/pycardano/txbuilder.py
@@ -994,7 +994,7 @@ def build(
         self._ensure_no_input_exclusion_conflict()
 
         # only automatically set the validity interval and required signers if scripts are involved
-        is_smart = bool(self.scripts)
+        is_smart = bool(self.all_scripts)
 
         # Automatically set the validity range to a tight value around transaction creation
         if (