diff --git a/webroot/rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadSource.js b/webroot/rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadSource.js
index 95e4b52f15..c982f5c3b0 100644
--- a/webroot/rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadSource.js
+++ b/webroot/rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadSource.js
@@ -185,7 +185,10 @@ JX.install('TypeaheadSource', {
       this._raw[obj.id] = obj;
       var t = this.tokenize(obj.tokenizable || obj.name);
       for (var jj = 0; jj < t.length; ++jj) {
-        this._lookup[t[jj]] = this._lookup[t[jj]] || [];
+        if (typeof this._lookup[t[jj]] == "function")
+          this._lookup[t[jj]] = [];
+        else
+          this._lookup[t[jj]] = this._lookup[t[jj]] || [];
         this._lookup[t[jj]].push(obj.id);
       }
     },