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-rw-r--r--navit/osd.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/navit/osd.c b/navit/osd.c
index 26e8952ee..a5530c0d7 100644
--- a/navit/osd.c
+++ b/navit/osd.c
@@ -196,7 +196,9 @@ osd_std_calculate_sizes(struct osd_item *item, int w, int h)
* @brief Recalculates the size and position of an OSD item and
* triggers a redraw of the item.
*
- * @param item
+ * This is a callback function that can be stored in the `resize_cb` member of an OSD item.
+ *
+ * @param item The OSD item to resize and redraw
* @param priv
* @param w Available screen width in pixels (the width that corresponds to
* 100%)