diff --git a/libs/canvas/wave_view.cc b/libs/canvas/wave_view.cc
index 11c1da21ed..a756cfe430 100644
--- a/libs/canvas/wave_view.cc
+++ b/libs/canvas/wave_view.cc
@@ -873,7 +873,7 @@ WaveView::generate_image (boost::shared_ptr<WaveViewThreadRequest> req, bool in_
 		
 		if (peaks_read > 0) {
 
-			for (framecnt_t i = 0; i < peaks_read; ++i) {
+			for (framecnt_t i = 0; i < n_peaks; ++i) {
 				peaks[i].max *= _amplitude_above_axis;
 				peaks[i].min *= _amplitude_above_axis;
 			}