diff --git a/Source/DataSources/ModelVisualizer.js b/Source/DataSources/ModelVisualizer.js
index 33fe9f258313..f2824c89b2da 100644
--- a/Source/DataSources/ModelVisualizer.js
+++ b/Source/DataSources/ModelVisualizer.js
@@ -125,7 +125,7 @@ define([
             model.show = true;
             model.scale = Property.getValueOrDefault(modelGraphics._scale, time, defaultScale);
             model.minimumPixelSize = Property.getValueOrDefault(modelGraphics._minimumPixelSize, time, defaultMinimumPixelSize);
-            model.maximumScale = Property.getValueOrDefault(modelGraphics._maximumScale, time, null);
+            model.maximumScale = Property.getValueOrUndefined(modelGraphics._maximumScale, time);
             model.modelMatrix = Matrix4.clone(modelMatrix, model.modelMatrix);
         }
         return true;