diff --git a/src/plot.jl b/src/plot.jl
index ecb0902f..57586856 100644
--- a/src/plot.jl
+++ b/src/plot.jl
@@ -167,7 +167,7 @@ function _plot!(plt::Plot, d::KW, args...)
     # we simply add the GroupBy object to the front of the args list to allow
     # the recipe to be applied
     if haskey(d, :group)
-        args = tuple(extractGroupArgs(d[:group], args...), args...)
+        args = (extractGroupArgs(d[:group], args...), args...)
     end
 
 
diff --git a/src/recipes.jl b/src/recipes.jl
index da4ff3b0..a5f55f9a 100644
--- a/src/recipes.jl
+++ b/src/recipes.jl
@@ -549,6 +549,7 @@ type OHLC{T<:Real}
   low::T
   close::T
 end
+Base.convert(::Type{OHLC}, tup::Tuple) = OHLC(tup...)
 tuple(ohlc::OHLC) = (ohlc.open, ohlc.high, ohlc.low, ohlc.close)
 
 # get one OHLC path