These functions made it into 2.0.18
diff --git a/include/SDL_render.h b/include/SDL_render.h
index 97ccac5..daf2d98 100644
--- a/include/SDL_render.h
+++ b/include/SDL_render.h
@@ -989,7 +989,7 @@ extern DECLSPEC void SDLCALL SDL_RenderGetScale(SDL_Renderer * renderer,
* \param logicalX the pointer filled with the logical x coordinate
* \param logicalY the pointer filled with the logical y coordinate
*
- * \since This function is available since SDL 2.0.20.
+ * \since This function is available since SDL 2.0.18.
*
* \sa SDL_RenderGetScale
* \sa SDL_RenderSetScale
@@ -1011,7 +1011,7 @@ extern DECLSPEC void SDLCALL SDL_RenderWindowToLogical(SDL_Renderer * renderer,
* \param windowY the pointer filled with the real Y coordinate in the window
*
- * \since This function is available since SDL 2.0.20.
+ * \since This function is available since SDL 2.0.18.
*
* \sa SDL_RenderGetScale
* \sa SDL_RenderSetScale