diff --git a/src/core/CL/cl_kernels/reduction_operation.cl b/src/core/CL/cl_kernels/reduction_operation.cl
index 79d0d06..0c39334 100644
--- a/src/core/CL/cl_kernels/reduction_operation.cl
+++ b/src/core/CL/cl_kernels/reduction_operation.cl
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2019 ARM Limited.
+ * Copyright (c) 2016-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -31,8 +31,8 @@
 #define ISGREATER(x, y) (x > y) ? 1 : 0
 #define ISLESS(x, y) (x < y) ? 1 : 0
 #else // !defined(WIDTH)
-#define ISGREATER(x, y) select(int16)0, int16) - 1, x > y)
-#define ISLESS(x, y) select(int16)0, int16) - 1, x < y)
+#define ISGREATER(x, y) select((int16)0, (int16)-1, x > y)
+#define ISLESS(x, y) select((int16)0, (int16)-1, x < y)
 #endif // defined(WIDTH)
 #endif // defined(FLOAT_DATA_TYPE)