diff --git a/__pycache__/fib.cpython-38.pyc b/__pycache__/fib.cpython-38.pyc
new file mode 100644
index 0000000..ce35a51
Binary files /dev/null and b/__pycache__/fib.cpython-38.pyc differ
diff --git a/fib.py b/fib.py
index 421cfab..719ac73 100644
--- a/fib.py
+++ b/fib.py
@@ -6,8 +6,10 @@
 Negative numbers should return None
 """
 def fibonacci(position):
-  if(position == 1 or position == 2):
-    return 1
+  if(position == 0 or position == 1):
+    return position
+  if(position<0):
+    return None
   return fibonacci(position - 1) + fibonacci(position - 2)