diff --git a/src/utilities/FilterUtil.js b/src/utilities/FilterUtil.js
index c0179bb..cb849cd 100644
--- a/src/utilities/FilterUtil.js
+++ b/src/utilities/FilterUtil.js
@@ -274,18 +274,20 @@ module.exports = class FilterUtility {
                 //log += `\next reg: ${tmp}`;
                 const fullWord = words.find((word) => word.includes(match[1]));
 
-                let inWL = false;
-                try { // This is for debugging only
-                    inWL = FilterUtility.whitelist.find(fullWord);
-                } catch (err) {
-                    this.logger.error(`Whitelist.find error: ${fullWord} ${match[1]} ${words}`);
-                }
-                if (inWL || whitelist.some((word) => word === fullWord)) continue;
+                if(fullWord) {
+                    let inWL = false;
+                    try { // This is for debugging only
+                        inWL = FilterUtility.whitelist.find(fullWord);
+                    } catch (err) {
+                        this.logger.error(`Whitelist.find error: ${fullWord} ${match[1]} ${words}`);
+                    }
+                    if (inWL || whitelist.some((word) => word === fullWord)) continue;
 
-                const diff = Math.abs(fullWord.length - match[0].length);
-                if (diff > 3) {
-                    this.logger.debug(`Match length diff: ${diff} MATCH: ${match[0]} FULL: ${fullWord}, CONTENT: ${content}`);
-                    continue;
+                    const diff = Math.abs(fullWord.length - match[0].length);
+                    if (diff > 3) {
+                        this.logger.debug(`Match length diff: ${diff} MATCH: ${match[0]} FULL: ${fullWord}, CONTENT: ${content}`);
+                        continue;
+                    } 
                 }
                 // log += `\nMessage matched with "${reg}" in the regex list.\nMatch: ${match[0]}, Full word: ${fullWord}\nFull content: ${content}`;
                 return {