SDL_RWsize: updated description
diff --git a/include/SDL_rwops.h b/include/SDL_rwops.h
index 0ccf0d5..90afebd 100644
--- a/include/SDL_rwops.h
+++ b/include/SDL_rwops.h
@@ -385,7 +385,7 @@ extern DECLSPEC void SDLCALL SDL_FreeRW(SDL_RWops * area);
#define RW_SEEK_END 2 /**< Seek relative to the end of data */
/**
- * Use this macro to get the size of the data stream in an SDL_RWops.
+ * Use this function to get the size of the data stream in an SDL_RWops.
*
* Prior to SDL 2.0.10, this function was a macro.
*