diff --git a/Project.toml b/Project.toml
index 5299ed3f..1bba3e4d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "TensorKit"
 uuid = "07d1fe3e-3e46-537d-9eac-e9e13d0d4cec"
 authors = ["Jutho Haegeman"]
-version = "0.12.3"
+version = "0.12.4"
 
 [deps]
 HalfIntegers = "f0d1745a-41c9-11e9-1dd9-e5d34d218721"
diff --git a/src/tensors/indexmanipulations.jl b/src/tensors/indexmanipulations.jl
index 293d2705..afca5b0d 100644
--- a/src/tensors/indexmanipulations.jl
+++ b/src/tensors/indexmanipulations.jl
@@ -229,25 +229,11 @@ end
     twist!(t::AbstractTensorMap, i::Int; inv::Bool=false) -> t
     twist!(t::AbstractTensorMap, is; inv::Bool=false) -> t
 
-Apply a twist to the `i`th index of `t`, storing the result in `t`.
+Apply a twist to the `i`th index of `t`, or all indices in `is`, storing the result in `t`.
 If `inv=true`, use the inverse twist.
 
 See [`twist`](@ref) for creating a new tensor.
 """
-function twist!(t::AbstractTensorMap, i::Int; inv::Bool=false)
-    if i > numind(t)
-        msg = "Can't twist index $i of a tensor with only $(numind(t)) indices."
-        throw(ArgumentError(msg))
-    end
-    BraidingStyle(sectortype(t)) == Bosonic() && return t
-    N₁ = numout(t)
-    for (f₁, f₂) in fusiontrees(t)
-        θ = i <= N₁ ? twist(f₁.uncoupled[i]) : twist(f₂.uncoupled[i - N₁])
-        inv && (θ = θ')
-        rmul!(t[f₁, f₂], θ)
-    end
-    return t
-end
 function twist!(t::AbstractTensorMap, is; inv::Bool=false)
     if !all(in(allind(t)), is)
         msg = "Can't twist indices $is of a tensor with only $(numind(t)) indices."