diff --git a/readTrace.py b/readTrace.py
index 0b59251aa3f6cd85fed2526819acaa02b85128f0..aa36fdd73fd7ecc7acf76a198b13e3b406d14f6e 100755
--- a/readTrace.py
+++ b/readTrace.py
@@ -62,6 +62,9 @@ class Step() :
     self.stack = None
     self.historyPop = None
     self.history = None
+
+    self.distance = 0
+    self.oracleIndex = 0
 #-------------------------------------------------------------------------------
 
 #-------------------------------------------------------------------------------