diff --git a/src/js/tab.js b/src/js/tab.js
index b7b92897e..41cb37724 100644
--- a/src/js/tab.js
+++ b/src/js/tab.js
@@ -647,7 +647,10 @@ vAPI.tabs.onPopupUpdated = (function() {
         if ( pos === -1 ) {
             return '';
         }
-        if ( beg >= pos + openerHostname.length || end < pos ) {
+        // https://github.com/gorhill/uBlock/issues/1471
+        // We test whether the opener hostname as at least one character
+        // within matched portion of URL.
+        if ( beg >= pos + openerHostname.length || end <= pos ) {
             return '';
         }
         return result;