diff --git a/src/Fixer/Import/FullyQualifiedStrictTypesFixer.php b/src/Fixer/Import/FullyQualifiedStrictTypesFixer.php
index 62c28eef33d..641efaaf494 100644
--- a/src/Fixer/Import/FullyQualifiedStrictTypesFixer.php
+++ b/src/Fixer/Import/FullyQualifiedStrictTypesFixer.php
@@ -77,7 +77,7 @@ final class FullyQualifiedStrictTypesFixer extends AbstractFixer implements Conf
      *     function?: list<class-string>
      * }|null
      */
-    private ?array $discoveredSymbols;
+    private ?array $discoveredSymbols = null;
 
     /**
      * @var array{
diff --git a/src/Tokenizer/Token.php b/src/Tokenizer/Token.php
index 77303c7ace5..4b12c09f9ba 100644
--- a/src/Tokenizer/Token.php
+++ b/src/Tokenizer/Token.php
@@ -32,7 +32,7 @@ final class Token
     /**
      * ID of token prototype, if available.
      */
-    private ?int $id;
+    private ?int $id = null;
 
     /**
      * If token prototype is an array.