diff --git a/src/var.jl b/src/var.jl
index 52877ac..b7eb350 100644
--- a/src/var.jl
+++ b/src/var.jl
@@ -145,7 +145,8 @@ end
 
 MP.monomial(v::Variable) = Monomial(v)
 MP.variables(v::Variable) = [v]
-MP.ordering(::Variable{V,M}) where {V,M} = M
+MP.ordering(v::Variable) = MP.ordering(typeof(v))
+MP.ordering(::Type{Variable{V,M}}) where {V,M} = M
 
 iscomm(::Type{Variable{C}}) where {C} = C