diff --git a/tfjs-backend-wasm/src/kernels/Concat.ts b/tfjs-backend-wasm/src/kernels/Concat.ts
index 5cf36b35593..73e2e9efc06 100644
--- a/tfjs-backend-wasm/src/kernels/Concat.ts
+++ b/tfjs-backend-wasm/src/kernels/Concat.ts
@@ -25,7 +25,10 @@ interface ConcatAttrs extends NamedAttrMap {
 
 function concat(
     args: {inputs: TensorInfo[], backend: BackendWasm, attrs: ConcatAttrs}) {
-  const {inputs, backend, attrs: {axis}} = args;
+  const {inputs, backend} = args;
+
+  const axis = util.parseAxisParam(args.attrs.axis, inputs[0].shape)[0];
+
   const outShape = backend_util.computeOutShape(inputs.map(t => t.shape), axis);
   const out = backend.makeOutput(outShape, inputs[0].dtype);
 
diff --git a/tfjs-core/src/ops/concat.ts b/tfjs-core/src/ops/concat.ts
index 98b9056bfe5..1651dd37a4f 100644
--- a/tfjs-core/src/ops/concat.ts
+++ b/tfjs-core/src/ops/concat.ts
@@ -94,7 +94,6 @@ function concat_<T extends Tensor>(tensors: Array<T|TensorLike>, axis = 0): T {
   assertParamsConsistent(shapes, $axis);
 
   const forward: ForwardFunc<Tensor> = (backend, save) => {
-    const $axis = parseAxisParam(axis, $tensors[0].shape)[0];
     const res = backend.concat($tensors, $axis);
     save($tensors);
     return res;
diff --git a/tfjs-core/src/ops/concat_test.ts b/tfjs-core/src/ops/concat_test.ts
index d0dc79f4560..811308981c2 100644
--- a/tfjs-core/src/ops/concat_test.ts
+++ b/tfjs-core/src/ops/concat_test.ts
@@ -262,6 +262,14 @@ describeWithFlags('concat2d', ALL_ENVS, () => {
 });
 
 describeWithFlags('concat3d', ALL_ENVS, () => {
+  it('shapes correct concat axis=-1', async () => {
+    const tensor1 = tf.tensor3d([1, 2, 3], [1, 1, 3]);
+    const tensor2 = tf.tensor3d([4, 5, 6], [1, 1, 3]);
+    const values = tf.concat3d([tensor1, tensor2], -1);
+    expect(values.shape).toEqual([1, 1, 6]);
+    expectArraysClose(await values.data(), [1, 2, 3, 4, 5, 6]);
+  });
+
   it('shapes correct concat axis=0', async () => {
     const tensor1 = tf.tensor3d([1, 2, 3], [1, 1, 3]);
     const tensor2 = tf.tensor3d([4, 5, 6], [1, 1, 3]);