diff --git a/src/Options.jl b/src/Options.jl
index 40ac726..473369d 100644
--- a/src/Options.jl
+++ b/src/Options.jl
@@ -38,7 +38,7 @@ function Options{T<:OptionsChecking}(::Type{T},args...)
     end
     n = div(length(args),2)
     keys, index, vals = if n > 0
-        (args[1:2:end], ntuple(n, identity), Any[args[2:2:end]...])
+        (args[1:2:end], tuple(collect(1:n)...), Any[args[2:2:end]...])
     else
         ((), (), Array(Any, 0))
     end