diff --git a/lib/Autocomplete.js b/lib/Autocomplete.js
index af2fe1aa..d336ec72 100644
--- a/lib/Autocomplete.js
+++ b/lib/Autocomplete.js
@@ -220,9 +220,9 @@ let Autocomplete = React.createClass({
     var node = this.refs.input
     var rect = node.getBoundingClientRect()
     var computedStyle = global.window.getComputedStyle(node)
-    var marginBottom = parseInt(computedStyle.marginBottom, 10)
-    var marginLeft = parseInt(computedStyle.marginLeft, 10)
-    var marginRight = parseInt(computedStyle.marginRight, 10)
+    var marginBottom = parseInt(computedStyle.marginBottom, 10) || 0;
+    var marginLeft = parseInt(computedStyle.marginLeft, 10) || 0;
+    var marginRight = parseInt(computedStyle.marginRight, 10) || 0;
     this.setState({
       menuTop: rect.bottom + marginBottom,
       menuLeft: rect.left + marginLeft,