diff --git a/basis/math/constants/constants.factor b/basis/math/constants/constants.factor
index c207eaa63c..118a8e8197 100755
--- a/basis/math/constants/constants.factor
+++ b/basis/math/constants/constants.factor
@@ -1,5 +1,6 @@
-! Copyright (C) 2004, 2005 Slava Pestov.
+! Copyright (C) 2004, 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
+USE: math
 IN: math.constants
 
 : e ( -- e ) 2.7182818284590452354 ; inline
@@ -7,3 +8,5 @@ IN: math.constants
 : phi ( -- phi ) 1.61803398874989484820 ; inline
 : pi ( -- pi ) 3.14159265358979323846 ; inline
 : epsilon ( -- epsilon ) 2.2204460492503131e-16 ; inline
+: smallest-float ( -- x ) HEX: 1 bits>double ; foldable
+: largest-float ( -- x ) HEX: 7fefffffffffffff bits>double ; foldable