diff --git a/base/modules/serial/psb_c_base_vect_mod.f90 b/base/modules/serial/psb_c_base_vect_mod.f90
index 2034a4cf..7462669c 100644
--- a/base/modules/serial/psb_c_base_vect_mod.f90
+++ b/base/modules/serial/psb_c_base_vect_mod.f90
@@ -498,7 +498,10 @@ contains
   !
   !> Function  base_maybe_free_buffer:
   !! \memberof  psb_c_base_vect_type
-  !! \brief Conditionally Free aux buffer
+  !! \brief Conditionally Free aux buffer.
+  !!        In some derived classes, e.g. GPU,
+  !!        does not really frees to avoid  runtime
+  !!        costs
   !!           
   !!  \param info  return code
   !!
diff --git a/base/modules/serial/psb_d_base_vect_mod.f90 b/base/modules/serial/psb_d_base_vect_mod.f90
index 4b2982bf..dafeb96c 100644
--- a/base/modules/serial/psb_d_base_vect_mod.f90
+++ b/base/modules/serial/psb_d_base_vect_mod.f90
@@ -498,7 +498,10 @@ contains
   !
   !> Function  base_maybe_free_buffer:
   !! \memberof  psb_d_base_vect_type
-  !! \brief Conditionally Free aux buffer
+  !! \brief Conditionally Free aux buffer.
+  !!        In some derived classes, e.g. GPU,
+  !!        does not really frees to avoid  runtime
+  !!        costs
   !!           
   !!  \param info  return code
   !!
diff --git a/base/modules/serial/psb_i_base_vect_mod.f90 b/base/modules/serial/psb_i_base_vect_mod.f90
index 2ad5cdd1..0f6a03e7 100644
--- a/base/modules/serial/psb_i_base_vect_mod.f90
+++ b/base/modules/serial/psb_i_base_vect_mod.f90
@@ -467,7 +467,10 @@ contains
   !
   !> Function  base_maybe_free_buffer:
   !! \memberof  psb_i_base_vect_type
-  !! \brief Conditionally Free aux buffer
+  !! \brief Conditionally Free aux buffer.
+  !!        In some derived classes, e.g. GPU,
+  !!        does not really frees to avoid  runtime
+  !!        costs
   !!           
   !!  \param info  return code
   !!
diff --git a/base/modules/serial/psb_s_base_vect_mod.f90 b/base/modules/serial/psb_s_base_vect_mod.f90
index 685c155f..79dc11cd 100644
--- a/base/modules/serial/psb_s_base_vect_mod.f90
+++ b/base/modules/serial/psb_s_base_vect_mod.f90
@@ -498,7 +498,10 @@ contains
   !
   !> Function  base_maybe_free_buffer:
   !! \memberof  psb_s_base_vect_type
-  !! \brief Conditionally Free aux buffer
+  !! \brief Conditionally Free aux buffer.
+  !!        In some derived classes, e.g. GPU,
+  !!        does not really frees to avoid  runtime
+  !!        costs
   !!           
   !!  \param info  return code
   !!
diff --git a/base/modules/serial/psb_z_base_vect_mod.f90 b/base/modules/serial/psb_z_base_vect_mod.f90
index 60bdb6fb..d2cf05d6 100644
--- a/base/modules/serial/psb_z_base_vect_mod.f90
+++ b/base/modules/serial/psb_z_base_vect_mod.f90
@@ -498,7 +498,10 @@ contains
   !
   !> Function  base_maybe_free_buffer:
   !! \memberof  psb_z_base_vect_type
-  !! \brief Conditionally Free aux buffer
+  !! \brief Conditionally Free aux buffer.
+  !!        In some derived classes, e.g. GPU,
+  !!        does not really frees to avoid  runtime
+  !!        costs
   !!           
   !!  \param info  return code
   !!