diff --git a/src/Network/HTTPClient/Client/HttpClient.php b/src/Network/HTTPClient/Client/HttpClient.php
index f6d0cf577..ae34defc4 100644
--- a/src/Network/HTTPClient/Client/HttpClient.php
+++ b/src/Network/HTTPClient/Client/HttpClient.php
@@ -26,7 +26,6 @@ use Friendica\Network\HTTPClient\Response\CurlResult;
 use Friendica\Network\HTTPClient\Response\GuzzleResponse;
 use Friendica\Network\HTTPClient\Capability\ICanSendHttpRequests;
 use Friendica\Network\HTTPClient\Capability\ICanHandleHttpResponses;
-use Friendica\Network\HTTPException\InternalServerErrorException;
 use Friendica\Util\Network;
 use Friendica\Util\Profiler;
 use GuzzleHttp\Client;
@@ -44,6 +43,9 @@ use Psr\Log\LoggerInterface;
  */
 class HttpClient implements ICanSendHttpRequests
 {
+	/** @var string Default value for "Accept" header */
+	const DEFAULT_ACCEPT = '*/*';
+
 	/** @var LoggerInterface */
 	private $logger;
 	/** @var Profiler */
@@ -141,6 +143,10 @@ class HttpClient implements ICanSendHttpRequests
 			}
 		};
 
+		if (empty($conf[HttpClientOptions::HEADERS]['Accept'])) {
+			$conf[HttpClientOptions::HEADERS]['Accept'] = static::DEFAULT_ACCEPT;
+		}
+
 		try {
 			$this->logger->debug('http request config.', ['url' => $url, 'method' => $method, 'options' => $conf]);