diff --git a/compute/cker/include/cker/eigen/bias_op.h b/compute/cker/include/cker/eigen/bias_op.h
index 7bd8d64031f..ff1c2bb228e 100644
--- a/compute/cker/include/cker/eigen/bias_op.h
+++ b/compute/cker/include/cker/eigen/bias_op.h
@@ -97,9 +97,7 @@ template <typename T>
 void biasHelper(const Shape &bias_shape, const T *bias_data, const Shape &input_shape,
                 T *input_data, T activation_min, T activation_max)
 {
-  int channel_dim = input_shape.DimensionsCount() - 1;
-
-  assert(input_shape.Dims(channel_dim) == bias_shape.Dims(0));
+  assert(input_shape.Dims(input_shape.DimensionsCount() - 1) == bias_shape.Dims(0));
   assert(input_data);
   assert(bias_data);