diff --git a/src/drawer.canvas.js b/src/drawer.canvas.js
index 7f0b27664..cbb5db526 100644
--- a/src/drawer.canvas.js
+++ b/src/drawer.canvas.js
@@ -194,10 +194,7 @@ WaveSurfer.util.extend(WaveSurfer.Drawer.Canvas, {
         }, this);
     },
 
-    updateProgress: function (progress) {
-        var pos = Math.round(
-            this.width * progress
-        ) / this.params.pixelRatio;
+    updateProgress: function (pos) {
         this.style(this.progressWave, { width: pos + 'px' });
     },
 
diff --git a/src/drawer.js b/src/drawer.js
index 941af412f..a41cb4142 100644
--- a/src/drawer.js
+++ b/src/drawer.js
@@ -186,7 +186,7 @@ WaveSurfer.Drawer = {
                 this.recenterOnPosition(newPos);
             }
 
-            this.updateProgress(progress);
+            this.updateProgress(pos);
         }
     },
 
diff --git a/src/drawer.multicanvas.js b/src/drawer.multicanvas.js
index 8e1cea83a..815d50344 100644
--- a/src/drawer.multicanvas.js
+++ b/src/drawer.multicanvas.js
@@ -309,10 +309,7 @@ WaveSurfer.util.extend(WaveSurfer.Drawer.MultiCanvas, {
         }
     },
 
-    updateProgress: function (progress) {
-        var pos = Math.round(
-            this.width * progress
-        ) / this.params.pixelRatio;
+    updateProgress: function (pos) {
         this.style(this.progressWave, { width: pos + 'px' });
     }
 });