diff --git a/src/ol/dom/input.js b/src/ol/dom/input.js
index f2737bcc0a..4b078616c2 100644
--- a/src/ol/dom/input.js
+++ b/src/ol/dom/input.js
@@ -152,7 +152,10 @@ ol.dom.Input.prototype.handleInputChanged_ = function() {
     this.setChecked(this.target_.checked);
   } else {
     this.setValue(this.target_.value);
-    this.setValueAsNumber(this.target_.valueAsNumber);
+    var number = this.target_.valueAsNumber;
+    if (goog.isDef(number) && !isNaN(number)) {
+      this.setValueAsNumber(number);
+    }
   }
 };