diff --git a/examples/fib.yasi b/examples/fib.yasi
index 9eaec32..0dcb66b 100644
--- a/examples/fib.yasi
+++ b/examples/fib.yasi
@@ -1,11 +1,5 @@
 (define (fib n)
-    (cond
-        (= n 0) 0
-        (= n 1) 1
-        (+
-            (fib (- n 1))
-            (fib (- n 2))
-        )
-    )
-)
-(print "fib(10) = " (fib 10))
+  (if (< n 2) n
+    (+ (fib (- n 1))
+       (fib (- n 2)))))
+(print "fib(25) = " (fib 25))