diff --git a/.eslintrc.js b/.eslintrc.js
index 4caf5f2b93..042c347feb 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -63,6 +63,7 @@ module.exports = {
         '@typescript-eslint/no-shadow': ['error'],
         'no-throw-literal': ['error'],
         'no-trailing-spaces': ['error'],
+        'no-undef-init': ['error'],
         'no-unused-expressions': ['off'],
         '@typescript-eslint/no-unused-expressions': ['error', { 'allowShortCircuit': true, 'allowTernary': true, 'allowTaggedTemplates': true }],
         'no-unused-private-class-members': ['error'],
diff --git a/src/apps/dashboard/components/activityTable/LogLevelChip.tsx b/src/apps/dashboard/components/activityTable/LogLevelChip.tsx
index 8053f770c1..9795c96b1d 100644
--- a/src/apps/dashboard/components/activityTable/LogLevelChip.tsx
+++ b/src/apps/dashboard/components/activityTable/LogLevelChip.tsx
@@ -5,7 +5,7 @@ import React from 'react';
 import globalize from 'scripts/globalize';
 
 const LogLevelChip = ({ level }: { level: LogLevel }) => {
-    let color: 'info' | 'warning' | 'error' | undefined = undefined;
+    let color: 'info' | 'warning' | 'error' | undefined;
     switch (level) {
         case LogLevel.Information:
             color = 'info';
diff --git a/src/components/images/imageLoader.js b/src/components/images/imageLoader.js
index 178312a314..561c968623 100644
--- a/src/components/images/imageLoader.js
+++ b/src/components/images/imageLoader.js
@@ -74,7 +74,7 @@ export function fillImage(entry) {
         throw new Error('entry cannot be null');
     }
     const target = entry.target;
-    let source = undefined;
+    let source;
 
     if (target) {
         source = target.getAttribute('data-src');