diff --git a/interface/wx/graphics.h b/interface/wx/graphics.h
index 48d8301e42..d6762be285 100644
--- a/interface/wx/graphics.h
+++ b/interface/wx/graphics.h
@@ -640,6 +640,8 @@ public:
         of gradient @a stops can be specified.
 
         The version taking wxGraphicsGradientStops is new in wxWidgets 2.9.1.
+
+        The ability to apply a transformation matrix to the gradient was added in 3.1.3
     */
     wxGraphicsBrush
     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
@@ -666,6 +668,8 @@ public:
         oColor and @a cColor or by a full set of gradient @a stops.
 
         The version taking wxGraphicsGradientStops is new in wxWidgets 2.9.1.
+
+        The ability to apply a transformation matrix to the gradient was added in 3.1.3
     */
     virtual wxGraphicsBrush
     CreateRadialGradientBrush(wxDouble startX, wxDouble startY,
@@ -1455,6 +1459,9 @@ public:
 
         Stops support is new since wxWidgets 2.9.1, previously only the start
         and end colours could be specified.
+
+        The ability to apply a transformation matrix to the gradient was added in 3.1.3
+        
     */
     virtual wxGraphicsBrush CreateLinearGradientBrush(wxDouble x1,
                                                       wxDouble y1,
@@ -1489,6 +1496,8 @@ public:
 
         Stops support is new since wxWidgets 2.9.1, previously only the start
         and end colours could be specified.
+
+        The ability to apply a transformation matrix to the gradient was added in 3.1.3
     */
     virtual wxGraphicsBrush CreateRadialGradientBrush(wxDouble startX, wxDouble startY,
                                                       wxDouble endX, wxDouble endY,