diff --git a/ext/ChainRulesKernelAbstractionsExt/ChainRulesKernelAbstractionsExt.jl b/ext/ChainRulesKernelAbstractionsExt/ChainRulesKernelAbstractionsExt.jl
index 153de32e0..a55837dba 100644
--- a/ext/ChainRulesKernelAbstractionsExt/ChainRulesKernelAbstractionsExt.jl
+++ b/ext/ChainRulesKernelAbstractionsExt/ChainRulesKernelAbstractionsExt.jl
@@ -10,18 +10,18 @@ using GPUArraysCore: AbstractGPUArray
 using KernelAbstractions
 
 function ChainRules.∇getindex!(dx::AbstractGPUArray, dy, inds...)
-    # kab = get_backend(dx)
-
-    # if KA.supports_atomics(kab)
-    #     gids = GPUArrays.to_indices(dx, inds)
-    #     idims = map(length, gids)
-    #     Is = map(Adapt.adapt(GPUArrays.ToGPU(dy)), gids)
-    #     scatter!(kab)(+, dx, dy, idims, Is...; ndrange=length(dy))
-    # else
+    kab = get_backend(dx)
+
+    if KA.supports_atomics(kab)
+        gids = GPUArrays.to_indices(dx, inds)
+        idims = map(length, gids)
+        Is = map(Adapt.adapt(GPUArrays.ToGPU(dy)), gids)
+        scatter!(kab)(+, dx, dy, idims, Is...; ndrange=length(dy))
+    else
         dx_cpu = Adapt.adapt(Array, dx)
         view(dx_cpu, Adapt.adapt(Array, inds)...) .+= Adapt.adapt(Array, dy)
         copyto!(dx, dx_cpu)
-    # end
+    end
     return dx
 end