diff --git a/application/editormodetrackux.cpp b/application/editormodetrackux.cpp
index 3cb577f6..a7e5e697 100644
--- a/application/editormodetrackux.cpp
+++ b/application/editormodetrackux.cpp
@@ -891,6 +891,8 @@ char const *editor_mode::typed_meaning() const
 		return "type the turn in degrees, + to the right";
 	if (m_lay.active && false == m_lay.points.empty())
 		return "type the length of the next leg, Enter adds the point";
+	if (m_extend.active && (m_track_layout == track_layout::arc_straight || m_track_layout == track_layout::straight_arc))
+		return "type the radius of the curve";
 	return nullptr;
 }
 
diff --git a/lang/editor_pl.po b/lang/editor_pl.po
index 0defa02f..f71b08db 100644
--- a/lang/editor_pl.po
+++ b/lang/editor_pl.po
@@ -9988,3 +9988,6 @@ msgstr "Przeciągnij przez tor"
 
 msgid "to the other side"
 msgstr "na drugą stronę"
+
+msgid "type the radius of the curve"
+msgstr "wpisz promień łuku"