diff --git a/GameLogic.py b/GameLogic.py
index fcd36cd..46bfdaf 100644
--- a/GameLogic.py
+++ b/GameLogic.py
@@ -31,11 +31,11 @@ class GameLogic():
             directions = ((0, 1), (1, 0), (1,1), (-1, 1))
             for mark in markList:
                 for direction in directions:
-                    if self.is_line(markList, mark, direction):
+                    if self._is_line(markList, mark, direction):
                         return player
             return False
     
-    def is_line(self, markList, mark, direction): # INTERNAL, I guess.
+    def _is_line(self, markList, mark, direction):
         for i in range(1, self.winRowLength):
             seeked = (mark[0] + direction[0] * i, mark[1] + direction[1] * i)
             if seeked in markList: