diff --git a/tests/validation/reference/Floor.cpp b/tests/validation/reference/Floor.cpp
index 1c73944..b011a16 100644
--- a/tests/validation/reference/Floor.cpp
+++ b/tests/validation/reference/Floor.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 ARM Limited.
+ * Copyright (c) 2017-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -50,6 +50,7 @@
     return dst;
 }
 
+template SimpleTensor<half> floor_layer(const SimpleTensor<half> &src);
 template SimpleTensor<float> floor_layer(const SimpleTensor<float> &src);
 } // namespace reference
 } // namespace validation