diff --git a/src/supervised/scaledloss.jl b/src/supervised/scaledloss.jl
index 8e07330..11a6ecc 100644
--- a/src/supervised/scaledloss.jl
+++ b/src/supervised/scaledloss.jl
@@ -14,7 +14,7 @@ following signature: `scaledloss(loss, Val{K})`
 """
 function scaledloss end
 
-_serror() = throw(ArgumentError("Scale factor K has to be strictly positive."))
+@inline _serror() = throw(ArgumentError("Scale factor K has to be strictly positive."))
 
 for KIND in (:MarginLoss, :DistanceLoss, :SupervisedLoss)
     SCALEDKIND = Symbol(:Scaled, KIND)
@@ -44,6 +44,7 @@ for KIND in (:MarginLoss, :DistanceLoss, :SupervisedLoss)
         immutable ($SCALEDKIND){L<:$KIND,K} <: $KIND
             loss::L
 
+            ($SCALEDKIND)() = typeof(K) <: Number && K > 0 ? new(L()) : _serror()
             ($SCALEDKIND)(args...) = typeof(K) <: Number && K > 0 ? new(L(args...)) : _serror()
             ($SCALEDKIND)(loss::L) = typeof(K) <: Number && K > 0 ? new(loss) : _serror()
         end