diff --git a/core/modules/filters/has.js b/core/modules/filters/has.js
index ab73c1e60..d05da4113 100644
--- a/core/modules/filters/has.js
+++ b/core/modules/filters/has.js
@@ -36,7 +36,7 @@ exports.has = function(source,operator,options) {
 	} else {
 		if(invert) {
 			source(function(tiddler,title) {
-				if(!tiddler || !$tw.utils.hop(tiddler.fields,operator.operand) || (tiddler.fields[operator.operand] !== "")) {
+				if(!tiddler || !$tw.utils.hop(tiddler.fields,operator.operand) || (tiddler.fields[operator.operand] === "")) {
 					results.push(title);
 				}
 			});