diff --git a/Numeric/Units/Dimensional/SIUnits.lhs b/Numeric/Units/Dimensional/SIUnits.lhs
--- a/Numeric/Units/Dimensional/SIUnits.lhs
+++ b/Numeric/Units/Dimensional/SIUnits.lhs
@@ -11,7 +11,7 @@
 referenced are from [1] unless otherwise specified.
 
 > {- |
->    Copyright  : Copyright (C) 2006-2013 Bjorn Buckwalter
+>    Copyright  : Copyright (C) 2006-2015 Bjorn Buckwalter
 >    License    : BSD3
 >
 >    Maintainer : bjorn.buckwalter@gmail.com
@@ -169,7 +169,7 @@
 appear here if we stricly followed table 3a).
 
 > lumen :: Fractional a => Unit DLuminousFlux a
-> lumen = candela / steradian
+> lumen = candela * steradian
 > lux :: Fractional a => Unit DIlluminance a
 > lux = lumen / meter ^ pos2
 
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,8 @@
+0.13.0.2 (2015-04)
+------------------
+*  Corrected definition of lumen.
+
+
 0.13.0.1 (2014-09)
 ------------------
 *  Bumped time dependency to < 1.6.
diff --git a/dimensional.cabal b/dimensional.cabal
--- a/dimensional.cabal
+++ b/dimensional.cabal
@@ -1,8 +1,8 @@
 Name:                dimensional
-Version:             0.13.0.1
+Version:             0.13.0.2
 License:             BSD3
 License-File:        LICENSE
-Copyright:           Bjorn Buckwalter 2006-2014
+Copyright:           Bjorn Buckwalter 2006-2015
 Author:              Bjorn Buckwalter
 Maintainer:          bjorn@buckwalter.se
 Stability:           mostly stable