diff --git a/src/PureJuMP/noncvxun.jl b/src/PureJuMP/noncvxun.jl
index e713c11f..79f2997b 100644
--- a/src/PureJuMP/noncvxun.jl
+++ b/src/PureJuMP/noncvxun.jl
@@ -1,4 +1,5 @@
 #   A nonconvex unconstrained function with a unique minimum value
+#   See discussion here https://github.com/JuliaSmoothOptimizers/CUTEst.jl/issues/321
 
 #   classification OUR2-AN-V-0