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-rw-r--r--src/fltk-widgets-groups-windows-single.adb1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/fltk-widgets-groups-windows-single.adb b/src/fltk-widgets-groups-windows-single.adb
index a012920..1c90ba3 100644
--- a/src/fltk-widgets-groups-windows-single.adb
+++ b/src/fltk-widgets-groups-windows-single.adb
@@ -88,6 +88,7 @@ package body FLTK.Widgets.Groups.Windows.Single is
Extra_Final (This);
if This.Void_Ptr /= Null_Pointer and This.Needs_Dealloc then
free_fl_single_window (This.Void_Ptr);
+ This.Void_Ptr := Null_Pointer;
end if;
end Finalize;