diff --git a/libs/ardour/disk_reader.cc b/libs/ardour/disk_reader.cc
index 207978f733..b15e107102 100644
--- a/libs/ardour/disk_reader.cc
+++ b/libs/ardour/disk_reader.cc
@@ -293,7 +293,7 @@ DiskReader::run (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame,
 
 		/* if monitoring disk but locating put silence in the buffers */
 
-		if (_no_disk_output || (still_locating && (ms == MonitoringDisk))) {
+		if ((_no_disk_output || still_locating) && (ms == MonitoringDisk)) {
 			bufs.silence (nframes, 0);
 		}