diff --git a/static/js/modes/waterfall.js b/static/js/modes/waterfall.js
index c9d9610..a5b4f8c 100644
--- a/static/js/modes/waterfall.js
+++ b/static/js/modes/waterfall.js
@@ -3262,7 +3262,8 @@ const Waterfall = (function () {
 
     function stepFreq(multiplier) {
         const step = _getNumber('wfStepSize', 0.1);
-        _setAndTune(_currentCenter() + multiplier * step, true);
+        // Coalesce rapid step-button presses into one final retune.
+        _setAndTune(_currentCenter() + multiplier * step, false);
     }
 
     function zoomBy(factor) {