diff --git a/src/SapiNormalizer.php b/src/SapiNormalizer.php
index a709f4f..dcaeba6 100644
--- a/src/SapiNormalizer.php
+++ b/src/SapiNormalizer.php
@@ -90,7 +90,7 @@ public function normalizeHeaders(array $server): array
         $headers = [];
 
         foreach ($server as $name => $value) {
-            if (!is_string($name) ||  $value === '') {
+            if (!is_string($name)) {
                 continue;
             }
 
@@ -102,6 +102,7 @@ public function normalizeHeaders(array $server): array
 
             if (strpos($name, 'HTTP_') === 0) {
                 $headers[$this->normalizeHeaderName(substr($name, 5))] = $value;
+                continue;
             }
 
             if (strpos($name, 'CONTENT_') === 0) {
diff --git a/tests/SapiNormalizerTest.php b/tests/SapiNormalizerTest.php
index 9786a40..ec72928 100644
--- a/tests/SapiNormalizerTest.php
+++ b/tests/SapiNormalizerTest.php
@@ -24,6 +24,7 @@ public function setUp(): void
     {
         $this->normalizer = new SapiNormalizer();
         $this->server = [
+            'value-without-name',
             'HTTPS' => 'on',
             'SERVER_PORT' => '443',
             'REQUEST_METHOD' => 'GET',