diff --git a/arm_compute/runtime/CL/functions/CLGaussian5x5.h b/arm_compute/runtime/CL/functions/CLGaussian5x5.h
index cf5b79e..d08cef2 100644
--- a/arm_compute/runtime/CL/functions/CLGaussian5x5.h
+++ b/arm_compute/runtime/CL/functions/CLGaussian5x5.h
@@ -47,6 +47,8 @@
  * -# @ref CLGaussian5x5HorKernel
  * -# @ref CLGaussian5x5VertKernel
  *
+ * @deprecated This function is deprecated and is intended to be removed in 21.05 release
+ *
  */
 class CLGaussian5x5 : public IFunction
 {