diff --git a/src/math/exp_amd64.s b/src/math/exp_amd64.s
index 525745d66c..b3e1c22d04 100644
--- a/src/math/exp_amd64.s
+++ b/src/math/exp_amd64.s
@@ -8,7 +8,7 @@
 // methods of elementary functions suitable for SIMD computation", Proc.
 // of International Supercomputing Conference 2010 (ISC'10), pp. 25 -- 32
 // (May 2010). The paper is available at
-// https://www.springerlink.com/content/340228x165742104/
+// https://link.springer.com/article/10.1007/s00450-010-0108-2
 //
 // The original code and the constants below are from the author's
 // implementation available at http://freshmeat.net/projects/sleef.