diff --git a/buggy.py b/buggy.py
--- a/buggy.py
+++ b/buggy.py
@@ -8,7 +8,7 @@
 
 
 class Solution:
-    def findKthPositive(self, arr: [], k: int) -> int:
+    def findKthPositive(self, arr: List[int], k: int) -> int:
         l, h = 0, len(arr)
         while l < h:
             mid = (h + l) // 2
@@ -16,4 +16,4 @@
                 h = mid
             else:
                 l = mid + 1
-        return self.undefined_method(l + k)
+        return l + k
