diff --git a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
index f236c5bb1e..b20d845e05 100644
--- a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
+++ b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
@@ -519,7 +519,9 @@ class ClassMetadataInfo implements ClassMetadata
      *
      * @see discriminatorColumn
      *
-     * @var mixed
+     * @var array
+     *
+     * @psalm-var array<string, class-string>
      */
     public $discriminatorMap = [];
 
diff --git a/psalm-baseline.xml b/psalm-baseline.xml
index ad5b01db83..1a5ef25ad7 100644
--- a/psalm-baseline.xml
+++ b/psalm-baseline.xml
@@ -653,7 +653,8 @@
       <code>$table</code>
       <code>$tableGeneratorDefinition</code>
     </PropertyNotSetInConstructor>
-    <PropertyTypeCoercion occurrences="10">
+    <PropertyTypeCoercion occurrences="11">
+      <code>$this-&gt;discriminatorMap</code>
       <code>$this-&gt;entityListeners</code>
       <code>$this-&gt;fieldMappings</code>
       <code>$this-&gt;fullyQualifiedClassName($repositoryClassName)</code>