arm_compute v18.05
diff --git a/tests/validation/reference/ConvolutionLayer.h b/tests/validation/reference/ConvolutionLayer.h
index 57455ba..ff3b153 100644
--- a/tests/validation/reference/ConvolutionLayer.h
+++ b/tests/validation/reference/ConvolutionLayer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 ARM Limited.
+ * Copyright (c) 2017-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -36,7 +36,8 @@
 namespace reference
 {
 template <typename T, typename TB>
-SimpleTensor<T> convolution_layer(const SimpleTensor<T> &src, const SimpleTensor<T> &weights, const SimpleTensor<TB> &bias, const TensorShape &output_shape, const PadStrideInfo &info);
+SimpleTensor<T> convolution_layer(const SimpleTensor<T> &src, const SimpleTensor<T> &weights, const SimpleTensor<TB> &bias, const TensorShape &output_shape, const PadStrideInfo &info,
+                                  const Size2D &dilation = Size2D(1U, 1U));
 } // namespace reference
 } // namespace validation
 } // namespace test