diff --git a/scripts/state_transition.py b/scripts/state_transition.py
index 766f068..0835363 100644
--- a/scripts/state_transition.py
+++ b/scripts/state_transition.py
@@ -157,10 +157,10 @@ def hit_filter(s):
   return True
 
 def retrieve_name(var):
-	for fi in reversed(inspect.stack()):
-		names = [var_name for var_name, var_val in fi.frame.f_locals.items() if var_val is var]
-		if len(names) > 0:
-			return names[0]
+  for fi in reversed(inspect.stack()):
+    names = [var_name for var_name, var_val in fi.frame.f_locals.items() if var_val is var]
+    if len(names) > 0:
+      return names[0]
 
 filters = [
   invalid_filter,