diff --git a/libs/gtkmm2ext/gtkmm2ext/persistent_tooltip.h b/libs/gtkmm2ext/gtkmm2ext/persistent_tooltip.h
index 1b63db26e2..6507bbb479 100644
--- a/libs/gtkmm2ext/gtkmm2ext/persistent_tooltip.h
+++ b/libs/gtkmm2ext/gtkmm2ext/persistent_tooltip.h
@@ -39,9 +39,6 @@ public:
 
 	virtual bool dragging () const;
 
-	void explicit_show ();
-	void explicit_hide ();
-
 private:
 	bool timeout ();
 	void show ();
diff --git a/libs/gtkmm2ext/persistent_tooltip.cc b/libs/gtkmm2ext/persistent_tooltip.cc
index 72d1aa4db3..d9ccfa15f7 100644
--- a/libs/gtkmm2ext/persistent_tooltip.cc
+++ b/libs/gtkmm2ext/persistent_tooltip.cc
@@ -63,20 +63,6 @@ PersistentTooltip::timeout ()
 	return false;
 }
 
-void
-PersistentTooltip::explicit_show ()
-{
-	_timeout.disconnect ();
-	show ();
-}
-
-void
-PersistentTooltip::explicit_hide ()
-{
-	_timeout.disconnect ();
-	hide ();
-}
-
 bool
 PersistentTooltip::leave (GdkEventCrossing *)
 {