diff --git a/src/backend/tensorflow/graph.jl b/src/backend/tensorflow/graph.jl
index 650a29e6..8f5b47bc 100644
--- a/src/backend/tensorflow/graph.jl
+++ b/src/backend/tensorflow/graph.jl
@@ -1,6 +1,7 @@
 using Base: @get!
 using DataFlow: Constant, constant, Split
 using DataFlow.Interpreter
+using DataFlow.Interpreter: stack
 using Flux: imap
 using TensorFlow: RawTensor, TFException
 
@@ -19,7 +20,7 @@ graph(::typeof(σ), x) = nn.sigmoid(x)
 graph(::typeof(hcat), xs...) = concat(1, xs)
 graph(::typeof(seq), xs, n) = TensorFlow.unpack(xs, num = n, axis = 1)
 
-for op in (tanh, *, .*, .+, .-)
+for op in (tanh, *, .*, .+)
   @eval graph(::typeof($op), args...) = $op(args...)
 end