diff --git a/gtk2_ardour/editor_drag.cc b/gtk2_ardour/editor_drag.cc
index b2f84fe638..799d441b16 100644
--- a/gtk2_ardour/editor_drag.cc
+++ b/gtk2_ardour/editor_drag.cc
@@ -2800,7 +2800,7 @@ TrimDrag::motion (GdkEvent* event, bool first_move)
 				if (arv) {
 					boost::shared_ptr<AudioRegion> ar (arv->audio_region());
 					framecnt_t len = ar->fade_out()->back()->when;
-					framecnt_t diff = ar->last_frame() - i->initial_end;
+					framecnt_t diff = 1 + ar->last_frame() - i->initial_end;
 					framepos_t new_length = len + diff;
 					i->anchored_fade_length = min (ar->length(), new_length);
 					//i->anchored_fade_length = ar->verify_xfade_bounds (new_length, false  /*END*/ );
diff --git a/libs/ardour/ardour/region.h b/libs/ardour/ardour/region.h
index 071cae9127..54cfd57fea 100644
--- a/libs/ardour/ardour/region.h
+++ b/libs/ardour/ardour/region.h
@@ -139,7 +139,7 @@ class LIBARDOUR_API Region
 	/* first_frame() is an alias; last_frame() just hides some math */
 
 	framepos_t first_frame () const { return _position; }
-	framepos_t last_frame ()  const { return _position + _length; }
+	framepos_t last_frame ()  const { return _position + _length - 1; }
 
 	/** Return the earliest possible value of _position given the
 	 *  value of _start within the region's sources
@@ -151,7 +151,7 @@ class LIBARDOUR_API Region
 	framepos_t latest_possible_frame () const;
 
 	Evoral::Range<framepos_t> last_range () const {
-		return Evoral::Range<framepos_t> (_last_position, _last_position + _last_length);
+		return Evoral::Range<framepos_t> (_last_position, _last_position + _last_length - 1);
 	}
 	
 	Evoral::Range<framepos_t> range () const {