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-rw-r--r--net/ricketyspace/sicp/one/sixteen.scm2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ricketyspace/sicp/one/sixteen.scm b/net/ricketyspace/sicp/one/sixteen.scm
index 8bbd735..60bc531 100644
--- a/net/ricketyspace/sicp/one/sixteen.scm
+++ b/net/ricketyspace/sicp/one/sixteen.scm
@@ -22,5 +22,5 @@
(define (fast-expt-iter b n a)
"Excercise 1.16."
(cond ((= n 0) a)
- ((even? n) (fast-expt-iter b (- n 2) (* a (sqr b))))
+ ((even? n) (fast-expt-iter (sqr b) (/ n 2) a))
(else (fast-expt-iter b (- n 1) (* a b)))))