diff --git a/CachedEntry.php b/CachedEntry.php
index ef5c2345..5291e71a 100644
--- a/CachedEntry.php
+++ b/CachedEntry.php
@@ -28,12 +28,12 @@ public function __construct(string $userAgent, $clientHints, array $values)
         $clientHints = $clientHints ? ClientHints::factory($clientHints) : null;
         parent::__construct($userAgent, $clientHints);
 
-        $this->bot = $values['bot'] ?? '';
+        $this->bot = $values['bot'] ?? null;
         $this->brand = $values['brand'] ?? '';
-        $this->client = $values['client'] ?? '';
-        $this->device = $values['device'] ?? '';
+        $this->client = $values['client'] ?? null;
+        $this->device = $values['device'] ?? null;
         $this->model = $values['model'] ?? '';
-        $this->os = $values['os'] ?? '';
+        $this->os = $values['os'] ?? null;
 
         // Or cached entries only use the useragents, so if we have some client hints provided,
         // We use some special parsers, which use the cached user agent result and parses it again using client hints
diff --git a/tests/Integration/CachedEntryTest.php b/tests/Integration/CachedEntryTest.php
index 35fc358d..4e4c987e 100644
--- a/tests/Integration/CachedEntryTest.php
+++ b/tests/Integration/CachedEntryTest.php
@@ -115,7 +115,7 @@ public function testConstruct()
         $instance = new CachedEntry($userAgent, $clientHints, $values);
         $this->assertIsObject($instance);
         $this->assertInstanceOf(CachedEntry::class, $instance);
-        $this->assertSame('', $instance->getBot());
+        $this->assertSame(null, $instance->getBot());
         $this->assertSame($values['brand'], $instance->getBrandName());
         $this->assertSame($expectedClient, $instance->getClient());
         $this->assertSame($values['device'], $instance->getDevice());
@@ -123,6 +123,41 @@ public function testConstruct()
         $this->assertSame($expectedOs, $instance->getOs());
     }
 
+    public function testConstructDefault()
+    {
+        $userAgent = "unknown";
+
+        $clientHints = [
+            'HTTP_SEC_CH_UA_PLATFORM' => '"Windows"',
+            'HTTP_SEC_CH_UA' => '" Not A;Brand";v="99", "Chromium";v="95", "Microsoft Edge";v="95"',
+            'HTTP_SEC_CH_UA_MOBILE' => "?0",
+            'HTTP_SEC_CH_UA_FULL_VERSION' => '"98.0.0.1"',
+            'HTTP_SEC_CH_UA_PLATFORM_VERSION' => '"14.0.0"',
+            'HTTP_SEC_CH_UA_ARCH' => "x86",
+            'HTTP_SEC_CH_UA_BITNESS' => "64",
+            'HTTP_SEC_CH_UA_MODEL' => ""
+        ];
+
+        $expectedOs = [
+            'name' => 'Windows',
+            'short_name' => 'WIN',
+            'version' => '11',
+            'platform' => 'x64',
+            'family' => 'Windows',
+        ];
+
+
+        $instance = new CachedEntry($userAgent, $clientHints, []);
+        $this->assertIsObject($instance);
+        $this->assertInstanceOf(CachedEntry::class, $instance);
+        $this->assertSame(null, $instance->getBot());
+        $this->assertSame('', $instance->getBrandName());
+        $this->assertSame(null, $instance->getClient());
+        $this->assertSame(null, $instance->getDevice());
+        $this->assertSame('', $instance->getModel());
+        $this->assertSame($expectedOs, $instance->getOs());
+    }
+
     public function testGetNumCacheFiles_noneCached()
     {
         $this->assertEquals(0, CachedEntry::getNumEntriesInCacheDir());