diff --git a/libs/ardour/triggerbox.cc b/libs/ardour/triggerbox.cc
index 03d2593219..07c68ef68a 100644
--- a/libs/ardour/triggerbox.cc
+++ b/libs/ardour/triggerbox.cc
@@ -2189,7 +2189,7 @@ AudioTrigger::audio_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t
 					 * channel, but actually processes them all in one pass.
 					 */
 
-					_stretcher->process (&in[0], to_stretcher, at_end);
+					_stretcher->process (in, to_stretcher, at_end);
 
 					read_index += to_stretcher;
 					avail = _stretcher->available ();