diff --git a/Orb_AutFN.jl b/Orb_AutFN.jl
index 52cc801..94b0949 100644
--- a/Orb_AutFN.jl
+++ b/Orb_AutFN.jl
@@ -64,7 +64,7 @@ function init_model(Uπs)
 
     for k in 1:l
         s = size(Uπs[k],2)
-        P[k] = JuMP.@variable(m, P[k][i=1:s, j=1:s])
+        P[k] = JuMP.@variable(m, [i=1:s, j=1:s])
         JuMP.@SDconstraint(m, P[k] >= 0.0)
     end