diff --git a/src/widget/singleselect/trigger/searcher.singleselect.js b/src/widget/singleselect/trigger/searcher.singleselect.js
index a5674b8f1..3ba7c78e4 100644
--- a/src/widget/singleselect/trigger/searcher.singleselect.js
+++ b/src/widget/singleselect/trigger/searcher.singleselect.js
@@ -128,7 +128,7 @@ BI.SingleSelectSearcher = BI.inherit(BI.Widget, {
         if (BI.isUndefined(v)) {
             this.editor.setState(BI.Selection.None);
         } else {
-            v = v || "";
+            v = BI.isNull(v) ? "" : v;
             this.editor.setState(o.valueFormatter(v + "") || (v + ""));
         }
     },