diff --git a/linked_lists/intersection.py b/linked_lists/intersection.py
index f07e2ae..4c03aa0 100644
--- a/linked_lists/intersection.py
+++ b/linked_lists/intersection.py
@@ -11,4 +11,19 @@ def intersection_node(headA, headB):
     """ Will return the node at which the two lists intersect.
         If the two linked lists have no intersection at all, return None.
     """
-    pass
\ No newline at end of file
+    if not headA or not headB:
+        return None
+
+    a = headA
+    b = headB
+
+    while a != b:
+        if a:
+            a = a.next
+        else:
+            a = headB
+        if b:
+            b = b.next
+        else:
+            b = headA
+    return a
\ No newline at end of file