diff --git a/tools/formatter.py b/tools/formatter.py
index a89e620d..9ab82725 100644
--- a/tools/formatter.py
+++ b/tools/formatter.py
@@ -125,12 +125,12 @@ def remove_duplicate_points(entry: dict):
     Removes points from paths that occur twice after each other
     """
     path: list = entry['path']
-    last: list = path[0]
+    previous: list = path[0]
     for i in range(len(path)-1, -1, -1):
         current: list = path[i]
-        if current == last:
+        if current == previous:
             path.pop(i)
-        last = current
+        previous = current
 
     return entry