diff --git a/src/PureJuMP/hs61.jl b/src/PureJuMP/hs61.jl
index 43f7c57e..4868c1b0 100644
--- a/src/PureJuMP/hs61.jl
+++ b/src/PureJuMP/hs61.jl
@@ -18,8 +18,8 @@ function hs61(args...; kwargs...)
   nlp = Model()
   @variable(nlp, x[i = 1:3], start = 0)
 
-  @constraint(nlp, 3 * x[1] - 2 * x[2]^2 - 7 == 0)
-  @constraint(nlp, 4 * x[1] - x[3]^2 - 11 == 0)
+  @NLconstraint(nlp, 3 * x[1] - 2 * x[2]^2 - 7 == 0)
+  @NLconstraint(nlp, 4 * x[1] - x[3]^2 - 11 == 0)
 
   @NLobjective(nlp, Min, 4 * x[1]^2 + 2 * x[2]^2 + 2 * x[3]^2 - 33 * x[1] + 16 * x[2] - 24 * x[3])