diff --git a/graphics/nxmu/nx_setposition.c b/graphics/nxmu/nx_setposition.c
index d720f00f02c..1e59c10e276 100644
--- a/graphics/nxmu/nx_setposition.c
+++ b/graphics/nxmu/nx_setposition.c
@@ -84,7 +84,7 @@
  *
  ****************************************************************************/
 
-int nx_setposition(NXWINDOW hwnd, FAR struct nxgl_point_s *pos)
+int nx_setposition(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos)
 {
   FAR struct nxbe_window_s       *wnd = (FAR struct nxbe_window_s *)hwnd;
   struct nxsvrmsg_setposition_s outmsg;
diff --git a/graphics/nxmu/nx_setsize.c b/graphics/nxmu/nx_setsize.c
index 5a8a4c582b4..5655e61a29d 100644
--- a/graphics/nxmu/nx_setsize.c
+++ b/graphics/nxmu/nx_setsize.c
@@ -70,7 +70,7 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Name: nx_setsize`
+ * Name: nx_setsize
  *
  * Description:
  *  Set the size of the selected window
@@ -84,7 +84,7 @@
  *
  ****************************************************************************/
 
-int nx_setsize(NXWINDOW hwnd, FAR struct nxgl_size_s *size)
+int nx_setsize(NXWINDOW hwnd, FAR const struct nxgl_size_s *size)
 {
   FAR struct nxbe_window_s   *wnd = (FAR struct nxbe_window_s *)hwnd;
   struct nxsvrmsg_setsize_s outmsg;
diff --git a/graphics/nxsu/nx_setposition.c b/graphics/nxsu/nx_setposition.c
index 44e66061f8d..fc6d5bdc31b 100644
--- a/graphics/nxsu/nx_setposition.c
+++ b/graphics/nxsu/nx_setposition.c
@@ -84,7 +84,7 @@
  *
  ****************************************************************************/
 
-int nx_setposition(NXWINDOW hwnd, FAR struct nxgl_point_s *pos)
+int nx_setposition(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos)
 {
 #ifdef CONFIG_DEBUG
   if (!hwnd || !pos)
diff --git a/graphics/nxsu/nx_setsize.c b/graphics/nxsu/nx_setsize.c
index 19d20e5d2f2..171e26faed0 100644
--- a/graphics/nxsu/nx_setsize.c
+++ b/graphics/nxsu/nx_setsize.c
@@ -84,7 +84,7 @@
  *
  ****************************************************************************/
 
-int nx_setsize(NXWINDOW hwnd, FAR struct nxgl_size_s *size)
+int nx_setsize(NXWINDOW hwnd, FAR const struct nxgl_size_s *size)
 {
 #ifdef CONFIG_DEBUG
   if (!hwnd || !size)
diff --git a/graphics/nxtk/nxtk_setposition.c b/graphics/nxtk/nxtk_setposition.c
index dd090e63982..3c744112bb2 100644
--- a/graphics/nxtk/nxtk_setposition.c
+++ b/graphics/nxtk/nxtk_setposition.c
@@ -90,7 +90,7 @@
  *
  ****************************************************************************/
 
-int nxtk_setposition(NXTKWINDOW hfwnd, FAR struct nxgl_point_s *pos)
+int nxtk_setposition(NXTKWINDOW hfwnd, FAR const struct nxgl_point_s *pos)
 {
   FAR struct nxtk_framedwindow_s *fwnd = (FAR struct nxtk_framedwindow_s *)hfwnd;
   struct nxgl_point_s offset;
diff --git a/graphics/nxtk/nxtk_setsize.c b/graphics/nxtk/nxtk_setsize.c
index 054a62c5936..aeeebf15008 100644
--- a/graphics/nxtk/nxtk_setsize.c
+++ b/graphics/nxtk/nxtk_setsize.c
@@ -90,7 +90,7 @@
  *
  ****************************************************************************/
 
-int nxtk_setsize(NXTKWINDOW hfwnd, FAR struct nxgl_size_s *size)
+int nxtk_setsize(NXTKWINDOW hfwnd, FAR const struct nxgl_size_s *size)
 {
   FAR struct nxtk_framedwindow_s *fwnd = (FAR struct nxtk_framedwindow_s *)hfwnd;
   struct nxgl_size_s newsize;
diff --git a/include/nuttx/nx/nx.h b/include/nuttx/nx/nx.h
index 9e070b6ee02..c848b91e5f1 100644
--- a/include/nuttx/nx/nx.h
+++ b/include/nuttx/nx/nx.h
@@ -523,7 +523,7 @@ EXTERN int nx_getposition(NXWINDOW hwnd);
  *
  ****************************************************************************/
 
-EXTERN int nx_setposition(NXWINDOW hwnd, FAR struct nxgl_point_s *pos);
+EXTERN int nx_setposition(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos);
 
 /****************************************************************************
  * Name: nx_setsize
@@ -540,7 +540,7 @@ EXTERN int nx_setposition(NXWINDOW hwnd, FAR struct nxgl_point_s *pos);
  *
  ****************************************************************************/
 
-EXTERN int nx_setsize(NXWINDOW hwnd, FAR struct nxgl_size_s *size);
+EXTERN int nx_setsize(NXWINDOW hwnd, FAR const struct nxgl_size_s *size);
 
 /****************************************************************************
  * Name: nx_raise
diff --git a/include/nuttx/nx/nxtk.h b/include/nuttx/nx/nxtk.h
index ae11d565e3e..107d8677cc7 100644
--- a/include/nuttx/nx/nxtk.h
+++ b/include/nuttx/nx/nxtk.h
@@ -144,7 +144,7 @@ EXTERN int nxtk_getposition(NXTKWINDOW hfwnd);
  *
  ****************************************************************************/
 
-EXTERN int nxtk_setposition(NXTKWINDOW hfwnd, FAR struct nxgl_point_s *pos);
+EXTERN int nxtk_setposition(NXTKWINDOW hfwnd, FAR const struct nxgl_point_s *pos);
 
 /****************************************************************************
  * Name: nxtk_setsize
@@ -163,7 +163,7 @@ EXTERN int nxtk_setposition(NXTKWINDOW hfwnd, FAR struct nxgl_point_s *pos);
  *
  ****************************************************************************/
 
-EXTERN int nxtk_setsize(NXTKWINDOW hfwnd, FAR struct nxgl_size_s *size);
+EXTERN int nxtk_setsize(NXTKWINDOW hfwnd, FAR const struct nxgl_size_s *size);
 
 /****************************************************************************
  * Name: nxtk_raise