diff --git a/libs/ardour/audioregion.cc b/libs/ardour/audioregion.cc
index e07ab961a9..2eb09ae192 100644
--- a/libs/ardour/audioregion.cc
+++ b/libs/ardour/audioregion.cc
@@ -1043,6 +1043,9 @@ AudioRegion::set_fade_in (FadeShape shape, framecnt_t len)
 		break;
 	}
 
+	_fade_in->set_interpolation(Evoral::ControlList::Curved);
+	_inverse_fade_in->set_interpolation(Evoral::ControlList::Curved);
+
 	_default_fade_in = false;
 	_fade_in->thaw ();
 	send_change (PropertyChange (Properties::fade_in));
@@ -1117,6 +1120,9 @@ AudioRegion::set_fade_out (FadeShape shape, framecnt_t len)
 		break;
 	}
 
+	_fade_out->set_interpolation(Evoral::ControlList::Curved);
+	_inverse_fade_out->set_interpolation(Evoral::ControlList::Curved);
+
 	_default_fade_out = false;
 	_fade_out->thaw ();
 	send_change (PropertyChange (Properties::fade_out));