diff --git a/src/DocBlock/Tags/Factory/MethodParameterFactory.php b/src/DocBlock/Tags/Factory/MethodParameterFactory.php
index 6de2051..92ff69d 100644
--- a/src/DocBlock/Tags/Factory/MethodParameterFactory.php
+++ b/src/DocBlock/Tags/Factory/MethodParameterFactory.php
@@ -66,7 +66,7 @@ final class MethodParameterFactory
     }
 
     /**
-     * @param array<array, null, int, float, bool, string, object> $defaultValue
+     * @param array<array|null|int|float|bool|string|object> $defaultValue
      * @return string
      */
     private function formatArray(array $defaultValue): string
diff --git a/src/DocBlock/Tags/MethodParameter.php b/src/DocBlock/Tags/MethodParameter.php
index 2cb8177..4cb2827 100644
--- a/src/DocBlock/Tags/MethodParameter.php
+++ b/src/DocBlock/Tags/MethodParameter.php
@@ -69,9 +69,12 @@ final class MethodParameter
         return $this->isVariadic;
     }
 
-    public function getDefaultValue(): mixed
+    public function getDefaultValue(): ?string
     {
-        return $this->defaultValue;
+        if (is_array($this->defaultValue)) {
+            return implode(',', $this->defaultValue);
+        }
+        return (string) $this->defaultValue;
     }
 
     public function __toString(): string
@@ -80,6 +83,6 @@ final class MethodParameter
             ($this->isReference() ? '&' : '') .
             ($this->isVariadic() ? '...' : '') .
             '$' . $this->getName() .
-            ($this->getDefaultValue() !== self::NO_DEFAULT_VALUE ? (new MethodParameterFactory)->format($this->getDefaultValue()) : '');
+            ($this->defaultValue !== self::NO_DEFAULT_VALUE ? (new MethodParameterFactory)->format($this->defaultValue) : '');
     }
 }