diff --git a/src/VTKViewport/vtkInteractorStyleMPRWindowLevel.js b/src/VTKViewport/vtkInteractorStyleMPRWindowLevel.js
index 64801df6..46ea7edb 100644
--- a/src/VTKViewport/vtkInteractorStyleMPRWindowLevel.js
+++ b/src/VTKViewport/vtkInteractorStyleMPRWindowLevel.js
@@ -42,8 +42,7 @@ function vtkInteractorStyleMPRWindowLevel(publicAPI, model) {
       .getScalars()
       .getRange();
     const imageDynamicRange = range[1] - range[0];
-    const multiplier =
-      Math.round(imageDynamicRange / 1024) * publicAPI.getLevelScale();
+    const multiplier = (imageDynamicRange / 1024) * publicAPI.getLevelScale();
     const dx = Math.round((pos[0] - model.wlStartPos[0]) * multiplier);
     const dy = Math.round((pos[1] - model.wlStartPos[1]) * multiplier);