diff --git a/src/Symfony/Component/HttpClient/HttpOptions.php b/src/Symfony/Component/HttpClient/HttpOptions.php
index 57590d3c131fc..8eba8ba055f7c 100644
--- a/src/Symfony/Component/HttpClient/HttpOptions.php
+++ b/src/Symfony/Component/HttpClient/HttpOptions.php
@@ -63,6 +63,17 @@ public function setQuery(array $query): static
         return $this;
     }
 
+    /**
+     * @return $this
+     */
+    public function addHeader(string $key, string $value): static
+    {
+        $this->options['headers'] ??= [];
+        $this->options['headers'][$key] = $value;
+
+        return $this;
+    }
+
     /**
      * @return $this
      */
diff --git a/src/Symfony/Component/HttpClient/Tests/HttpOptionsTest.php b/src/Symfony/Component/HttpClient/Tests/HttpOptionsTest.php
index 9dbbff7dd9364..487a889d454f7 100644
--- a/src/Symfony/Component/HttpClient/Tests/HttpOptionsTest.php
+++ b/src/Symfony/Component/HttpClient/Tests/HttpOptionsTest.php
@@ -39,4 +39,15 @@ public function testSetAuthBearer()
     {
         $this->assertSame('foobar', (new HttpOptions())->setAuthBearer('foobar')->toArray()['auth_bearer']);
     }
+
+    public function testAddHeader()
+    {
+        $options = new HttpOptions();
+        $options->addHeader('Accept', 'application/json');
+        $this->assertSame(['Accept' => 'application/json'], $options->toArray()['headers']);
+        $options->addHeader('Accept-Language', 'en-US,en;q=0.5');
+        $this->assertSame(['Accept' => 'application/json', 'Accept-Language' => 'en-US,en;q=0.5'], $options->toArray()['headers']);
+        $options->addHeader('Accept', 'application/html');
+        $this->assertSame(['Accept' => 'application/html', 'Accept-Language' => 'en-US,en;q=0.5'], $options->toArray()['headers']);
+    }
 }