3 files changed, 5 insertions, 2 deletions

diff --git a/packages/base/THANKS.md b/packages/base/THANKS.md
index 07b75b8..2e9574b 100644
--- a/packages/base/THANKS.md
+++ b/packages/base/THANKS.md
@@ -157,5 +157,7 @@ module reorganization, monadic mapVectorM, and many other improvements.
 
 - Denis Laxalde separated the gsl tests from the base ones.
 
+- Dylan Thurston reported an error in the glpk documentation.
+
 - Ian Ross reported the max/minIndex bug.
 
diff --git a/packages/glpk/hmatrix-glpk.cabal b/packages/glpk/hmatrix-glpk.cabal
index c115459..cd761e0 100644
--- a/packages/glpk/hmatrix-glpk.cabal
+++ b/packages/glpk/hmatrix-glpk.cabal
@@ -1,5 +1,5 @@
 Name:               hmatrix-glpk
-Version:            0.4.0.1
+Version:            0.4.0.2
 License:            GPL
 License-file:       LICENSE
 Author:             Alberto Ruiz
diff --git a/packages/glpk/src/Numeric/LinearProgramming.hs b/packages/glpk/src/Numeric/LinearProgramming.hs
index 5de8577..b0537cc 100644
--- a/packages/glpk/src/Numeric/LinearProgramming.hs
+++ b/packages/glpk/src/Numeric/LinearProgramming.hs
@@ -17,7 +17,8 @@ maximize 4 x_1 - 3 x_2 + 2 x_3
 subject to
 
 2 x_1 +   x_2 <= 10
-  x_3 + 5 x_4 <= 20
+
+  x_2 + 5 x_3 <= 20
 
 and