diff --git a/subprojects/gst-plugins-base/gst-libs/gst/video/navigation.h b/subprojects/gst-plugins-base/gst-libs/gst/video/navigation.h
index ced2892f10..6bd61a5991 100644
--- a/subprojects/gst-plugins-base/gst-libs/gst/video/navigation.h
+++ b/subprojects/gst-plugins-base/gst-libs/gst/video/navigation.h
@@ -275,6 +275,15 @@ typedef enum {
   GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE       = 4,
   GST_NAVIGATION_EVENT_MOUSE_MOVE                 = 5,
   GST_NAVIGATION_EVENT_COMMAND                    = 6,
+
+  /**
+   * GST_NAVIGATION_EVENT_MOUSE_SCROLL:
+   *
+   * A mouse scroll event. Use gst_navigation_event_parse_mouse_scroll_event()
+   * to extract the details from the event.
+   *
+   * Since: 1.18
+   */
   GST_NAVIGATION_EVENT_MOUSE_SCROLL               = 7
 } GstNavigationEventType;