diff --git a/rtgui/flatfield.cc b/rtgui/flatfield.cc
index 8df3db6f1..057ce731c 100644
--- a/rtgui/flatfield.cc
+++ b/rtgui/flatfield.cc
@@ -104,6 +104,11 @@ FlatField::FlatField () : FoldableToolPanel(this, "flatfield", M("TP_FLATFIELD_L
     }
 }
 
+FlatField::~FlatField ()
+{
+    idle_register.destroy();
+}
+
 void FlatField::read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited)
 {
     disableListener ();
@@ -416,6 +421,7 @@ void FlatField::flatFieldAutoClipValueChanged(int n)
         me->disableListener();
         me->flatFieldClipControl->setValue (d->n);
         me->enableListener();
+        delete d;
         return FALSE;
     };
 
diff --git a/rtgui/flatfield.h b/rtgui/flatfield.h
index e53274d85..599589b68 100644
--- a/rtgui/flatfield.h
+++ b/rtgui/flatfield.h
@@ -62,6 +62,7 @@ protected:
 public:
 
     FlatField ();
+    ~FlatField ();
 
     void read                (const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
     void write               (rtengine::procparams::ProcParams* pp, ParamsEdited* pedited = nullptr);