diff --git a/fib.lisp b/fib.lisp
index 8afb72d..9b8f1f6 100644
--- a/fib.lisp
+++ b/fib.lisp
@@ -1,3 +1,5 @@
+(in-package :math-algo)
+
 (defun my-fib-do-impl (n)
   (do ((counter 0 (1+ counter))
        (cur 0 next)