diff --git a/src/current/utils/sourceMaterial.js b/src/current/utils/sourceMaterial.js
index c6a338d4dc..438d7e9cc4 100644
--- a/src/current/utils/sourceMaterial.js
+++ b/src/current/utils/sourceMaterial.js
@@ -176,9 +176,10 @@ export const fetchData = async (language, issue) => {
 export const checkAYFExplainingBeliefsAssignment = (source) => {
   const { t } = getI18n();
 
+  const boundary = '(?:^|\\s|$)';
   const talk = t('talk', { lng: Setting.source_lang, ns: 'source' });
   const demonstration = t('demonstration', { lng: Setting.source_lang, ns: 'source' });
-  const searchKey = `\\b(${talk}|${demonstration})`;
+  const searchKey = boundary + `${talk}|${demonstration}` + boundary;
   const regex = new RegExp(searchKey, 'i');
   const result = source.match(regex);