diff --git a/include/SDL3/SDL_surface.h b/include/SDL3/SDL_surface.h
index 4ce6ee5353..312f51b1d6 100644
--- a/include/SDL3/SDL_surface.h
+++ b/include/SDL3/SDL_surface.h
@@ -137,6 +137,9 @@ extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateSurface
  * No copy is made of the pixel data. Pixel data is not managed automatically;
  * you must free the surface before you free the pixel data.
  *
+ * Pitch is the offset in bytes from one row of pixels to the next, e.g.
+ * `width*4` for `SDL_PIXELFORMAT_RGBA8888`.
+ *
  * You may pass NULL for pixels and 0 for pitch to create a surface that you
  * will fill in with valid values later.
  *