diff --git a/ChangeLog.txt b/ChangeLog.txt
index 264240639a..210eece041 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -7,6 +7,13 @@
    Entries may not always be in chronological/commit order.
    See license at the end of file. */
 
+2025-01-10 10:15 UTC+0100 Aleksander Czajczynski (hb fki.pl)
+  * src/rtl/listbox.prg
+    * merged #371 from Kamil, thanks for the patch.
+      Applied minor reformat .NOT. -> ! and added a comment
+      about buggy ListBox:hitTest() on no-box dropdown in
+      Cl*pper 5.3.
+
 2025-01-09 12:00 UTC+0100 Kamil Przybylski (kprzybylski quay.pl)
   * src/rtl/listbox.prg
     ! fixed nTop not being incremented in ListBox:hitTest() for no-box dropdown
diff --git a/src/rtl/listbox.prg b/src/rtl/listbox.prg
index 935eb70658..0755fab527 100644
--- a/src/rtl/listbox.prg
+++ b/src/rtl/listbox.prg
@@ -412,7 +412,10 @@ METHOD hitTest( nMRow, nMCol ) CLASS ListBox
       nTop++
    ENDIF
 
-   IF ::lIsOpen .AND. .NOT. Empty( ::cHotBox + ::cColdBox )
+   /* NOTE: Harbour extension over Cl*pper abilities, CLP5.3
+            with mouse support will crash, RTE "Argument Error: +"
+            when a borderless listbox/dropdown is mouse-clicked */
+   IF ::lIsOpen .AND. ! Empty( ::cHotBox + ::cColdBox )
 
       nOffset := 1
       DO CASE