diff --git a/arm_compute/runtime/CL/CLTensorAllocator.h b/arm_compute/runtime/CL/CLTensorAllocator.h
index a60594c..982cc51 100644
--- a/arm_compute/runtime/CL/CLTensorAllocator.h
+++ b/arm_compute/runtime/CL/CLTensorAllocator.h
@@ -114,6 +114,7 @@
      * @warning memory is expected to be aligned with the device requirements.
      * @warning tensor shouldn't be memory managed.
      * @warning ownership of memory is not transferred.
+     * @warning memory must be writable in case of in-place operations
      * @warning padding should be accounted by the client code.
      * @note buffer size will be checked to be compliant with total_size reported by ITensorInfo.
      *
diff --git a/arm_compute/runtime/TensorAllocator.h b/arm_compute/runtime/TensorAllocator.h
index c2a370f..2814113 100644
--- a/arm_compute/runtime/TensorAllocator.h
+++ b/arm_compute/runtime/TensorAllocator.h
@@ -99,6 +99,7 @@
      * @warning ownership of memory is not transferred.
      * @warning tensor shouldn't be memory managed.
      * @warning padding should be accounted by the client code.
+     * @warning memory must be writable in case of in-place operations
      * @note buffer alignment will be checked to be compliant with alignment reported by ITensorInfo.
      *
      * @param[in] memory Raw memory pointer to be used as backing memory