diff --git a/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php b/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php
index dcc03dae757..f766a76232e 100644
--- a/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php
+++ b/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php
@@ -354,13 +354,19 @@ private function getShortName(string $className): string
         return strtolower(end($parts));
     }
 
+    /**
+     * Puts the `inherited` and `declared` values into mapping information for fields, associations
+     * and embedded classes.
+     *
+     * @psalm-param array<string, FieldMapping|AssociationMapping|mixed[]> $mapping
+     */
     private function addMappingInheritanceInformation(array &$mapping, ClassMetadata $parentClass): void
     {
-        if (!isset($mapping['inherited']) && !$parentClass->isMappedSuperclass) {
+        if (! isset($mapping['inherited']) && ! $parentClass->isMappedSuperclass) {
             $mapping['inherited'] = $parentClass->name;
         }
 
-        if (!isset($mapping['declared'])) {
+        if (! isset($mapping['declared'])) {
             $mapping['declared'] = $parentClass->name;
         }
     }