1 files changed, 9 insertions, 5 deletions
diff --git a/src/fltk-widgets-valuators-sliders-nice.adb b/src/fltk-widgets-valuators-sliders-nice.adb
index f032c22..7fef1e8 100644
--- a/src/fltk-widgets-valuators-sliders-nice.adb
+++ b/src/fltk-widgets-valuators-sliders-nice.adb
@@ -55,16 +55,20 @@ package body FLTK.Widgets.Valuators.Sliders.Nice is
 
 
 
+    procedure Extra_Final
+           (This : in out Nice_Slider) is
+    begin
+        Extra_Final (Slider (This));
+    end Extra_Final;
+
+
     procedure Finalize
            (This : in out Nice_Slider) is
     begin
-        if  This.Void_Ptr /= Null_Pointer and then
-            This in Nice_Slider'Class
-        then
+        Extra_Final (This);
+        if This.Void_Ptr /= Null_Pointer and This.Needs_Dealloc then
             free_fl_nice_slider (This.Void_Ptr);
-            This.Void_Ptr := Null_Pointer;
         end if;
-        Finalize (Slider (This));
     end Finalize;