diff --git a/.cspell.json b/.cspell.json
index 953aae83e57..cfb25fc6e28 100644
--- a/.cspell.json
+++ b/.cspell.json
@@ -1093,6 +1093,7 @@
         "oldxml",
         "onecolumn",
         "onstart",
+        "opcache",
         "openapi",
         "openapirc",
         "opencontainers",
@@ -1497,4 +1498,4 @@
         "zaach",
         "zricethezav"
     ]
-}
\ No newline at end of file
+}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a0fc6905b0..94182cbc474 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@ Note: Can be used with `oxsecurity/megalinter@beta` in your GitHub Action mega-l
 - Fixes
   - Change `golangci-lint` lint mode to `project`
   - Disable sql-lint as it is no longer maintained
+  - Add new entries `findUnusedCode` and `findUnusedBaselineEntry` in default `psalm.xml` configuration file for PHP_PSALM linter. Related to <https://github.com/oxsecurity/megalinter/issues/3538>
 
 - Doc
   - Handle disabled_reason property in descriptors
diff --git a/TEMPLATES/psalm.xml b/TEMPLATES/psalm.xml
index 0eb2e126fa5..6f7b0af5a0c 100644
--- a/TEMPLATES/psalm.xml
+++ b/TEMPLATES/psalm.xml
@@ -1,4 +1,9 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 
-<psalm xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://getpsalm.org/schema/config" xmlns="https://getpsalm.org/schema/config">
+<psalm xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:noNamespaceSchemaLocation="https://getpsalm.org/schema/config"
+       xmlns="https://getpsalm.org/schema/config"
+       findUnusedCode="false"
+       findUnusedBaselineEntry="false"
+>
 </psalm>
diff --git a/megalinter/descriptors/php.megalinter-descriptor.yml b/megalinter/descriptors/php.megalinter-descriptor.yml
index 041730f09a3..ee7861ec23f 100644
--- a/megalinter/descriptors/php.megalinter-descriptor.yml
+++ b/megalinter/descriptors/php.megalinter-descriptor.yml
@@ -16,6 +16,8 @@ install:
     - php83-ctype
     - php83-curl
     - php83-dom
+    - php83-opcache
+    - php83-common
     - php83-simplexml
     - dpkg
   dockerfile: