diff --git a/readme.txt b/readme.txt
index cc4e5a90c..1a861d083 100644
--- a/readme.txt
+++ b/readme.txt
@@ -124,6 +124,8 @@ will report the screen size including the cutout, however it's not possible to d
 so you should use the size returned by SDL_GetWindowSize() and by SDL_WINDOWEVENT_RESIZED event,
 and you should use fullscreen window mode.
 
+SDL2 does not support Back button. You will need to draw back or pause button inside your app code.
+
 
 Licensing issues when using gradle
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