diff --git a/src/abstract_tensor_train.jl b/src/abstract_tensor_train.jl
index 594ed4d..1e60991 100644
--- a/src/abstract_tensor_train.jl
+++ b/src/abstract_tensor_train.jl
@@ -28,6 +28,21 @@ function check_bond_dims(tensors::Vector{<:Array})
     return true
 end
 
+"""
+    evaluate(A::AbstractTensorTrain, X...)
+
+Evaluate the Tensor Train `A` at input `X`
+
+Example:
+```@example
+    L = 3
+    q = (2, 3)
+    A = rand_tt(4, L, q...)
+    X = [[rand(1:qi) for qi in q] for l in 1:L]
+    evaluate(A, X)
+```
+"""
+evaluate(A::AbstractTensorTrain, X...) = tr(prod(@view a[:, :, x...] for (a,x) in zip(A, X...)))
 
 """
     normalize_eachmatrix!(A::AbstractTensorTrain)
diff --git a/src/periodic_tensor_train.jl b/src/periodic_tensor_train.jl
index b7f4586..1988a84 100644
--- a/src/periodic_tensor_train.jl
+++ b/src/periodic_tensor_train.jl
@@ -53,10 +53,6 @@ function rand_periodic_tt(bondsizes::AbstractVector{<:Integer}, q...)
 end
 rand_periodic_tt(d::Integer, L::Integer, q...) = rand_periodic_tt(fill(d, L-1), q...)
 
-evaluate(A::PeriodicTensorTrain, X...) = tr(prod(@view a[:, :, x...] for (a,x) in zip(A, X...)))
-
-
-
 
 function _compose(f, A::PeriodicTensorTrain{F,NA}, B::PeriodicTensorTrain{F,NB}) where {F,NA,NB}
     @assert NA == NB
diff --git a/src/tensor_train.jl b/src/tensor_train.jl
index 3271970..6c851d1 100644
--- a/src/tensor_train.jl
+++ b/src/tensor_train.jl
@@ -58,23 +58,6 @@ end
 rand_tt(d::Integer, L::Integer, q...) = rand_tt([1; fill(d, L-1); 1], q...)
 
 
-"""
-    evaluate(A::AbstractTensorTrain, X...)
-
-Evaluate the Tensor Train `A` at input `X`
-
-Example:
-```@example
-    L = 3
-    q = (2, 3)
-    A = rand_tt(4, L, q...)
-    X = [[rand(1:qi) for qi in q] for l in 1:L]
-    evaluate(A, X)
-```
-"""
-evaluate(A::TensorTrain, X...) = only(prod(@view a[:, :, x...] for (a,x) in zip(A, X...)))
-
-
 """
     orthogonalize_right!(A::AbstractTensorTrain; svd_trunc::SVDTrunc)