diff --git a/cml/domain/deconstruction.py b/cml/domain/deconstruction.py
index 4436a42ee94f3f7cf1bcb9caf9922fcf068599d6..a08fd16745e3893abe6b6eef2097a3333ca51dd9 100644
--- a/cml/domain/deconstruction.py
+++ b/cml/domain/deconstruction.py
@@ -96,7 +96,7 @@ class RelativeFinder:
 class Deconstructor:
     TIME_COLUMN = "T"
     SUBJECT_COLUMN = "Sigma"
-    PUPORSE_COLUMN = "Z"
+    PURPOSE_COLUMN = "Z"
 
     def __init__(self, knowledge_database, relative_finder, settings):
         self.knowledge_database = knowledge_database