diff --git a/src/js/static-net-filtering.js b/src/js/static-net-filtering.js
index 05ef6e943..6b41e7d7f 100644
--- a/src/js/static-net-filtering.js
+++ b/src/js/static-net-filtering.js
@@ -2313,7 +2313,7 @@ FilterParser.prototype.makeToken = function() {
 /******************************************************************************/
 
 FilterParser.prototype.isJustOrigin = function() {
-    return this.datatype === undefined &&
+    return this.dataType === undefined &&
            this.redirect === false &&
            this.domainOpt !== '' &&
            /^(?:\*|https?:(?:\/\/)?)$/.test(this.f) &&