diff --git a/lcl/interfaces/win32/win32proc.pp b/lcl/interfaces/win32/win32proc.pp
index 1cb1abd335..3dadcd62f9 100644
--- a/lcl/interfaces/win32/win32proc.pp
+++ b/lcl/interfaces/win32/win32proc.pp
@@ -843,8 +843,7 @@ begin
       if Assigned(lWindowInfo) then
       begin
         lWinControl := lWindowInfo^.WinControl;
-        if Assigned(lWinControl) and
-          (lWinControl is TCustomForm) and
+        if (lWinControl is TCustomForm) and
           (TCustomForm(lWinControl).FormStyle = fsSystemStayOnTop) then
         Exit;
       end;