diff --git a/src/Model/GServer.php b/src/Model/GServer.php
index 009816d818..3a2a0bd798 100644
--- a/src/Model/GServer.php
+++ b/src/Model/GServer.php
@@ -1639,7 +1639,7 @@ class GServer
 		if (!empty($accesstoken)) {
 			$api = 'https://instances.social/api/1.0/instances/list?count=0';
 			$header = ['Authorization: Bearer '.$accesstoken];
-			$curlResult = DI::httpRequest()->get($api, ['headers' => $header]);
+			$curlResult = DI::httpRequest()->get($api, ['header' => $header]);
 
 			if ($curlResult->isSuccess()) {
 				$servers = json_decode($curlResult->getBody(), true);
diff --git a/src/Module/Magic.php b/src/Module/Magic.php
index fc37d91b45..af8ff36056 100644
--- a/src/Module/Magic.php
+++ b/src/Module/Magic.php
@@ -88,19 +88,19 @@ class Magic extends BaseModule
 				$exp = explode('/profile/', $contact['url']);
 				$basepath = $exp[0];
 
-				$headers = [];
-				$headers['Accept'] = 'application/x-dfrn+json, application/x-zot+json';
-				$headers['X-Open-Web-Auth'] = Strings::getRandomHex();
+				$header = [];
+				$header['Accept'] = 'application/x-dfrn+json, application/x-zot+json';
+				$header['X-Open-Web-Auth'] = Strings::getRandomHex();
 
 				// Create a header that is signed with the local users private key.
-				$headers = HTTPSignature::createSig(
-					$headers,
+				$header = HTTPSignature::createSig(
+					$header,
 					$user['prvkey'],
 					'acct:' . $user['nickname'] . '@' . DI::baseUrl()->getHostname() . (DI::baseUrl()->getUrlPath() ? '/' . DI::baseUrl()->getUrlPath() : '')
 				);
 
 				// Try to get an authentication token from the other instance.
-				$curlResult = DI::httpRequest()->get($basepath . '/owa', ['headers' => $headers]);
+				$curlResult = DI::httpRequest()->get($basepath . '/owa', ['header' => $header]);
 
 				if ($curlResult->isSuccess()) {
 					$j = json_decode($curlResult->getBody(), true);
diff --git a/src/Network/HTTPRequest.php b/src/Network/HTTPRequest.php
index df62ea4544..93ce86c870 100644
--- a/src/Network/HTTPRequest.php
+++ b/src/Network/HTTPRequest.php
@@ -141,6 +141,7 @@ class HTTPRequest implements IHTTPRequest
 		curl_setopt($ch, CURLOPT_ENCODING, '');
 
 		if (!empty($opts['headers'])) {
+			$this->logger->warning('Wrong option \'headers\' used.');
 			@curl_setopt($ch, CURLOPT_HTTPHEADER, $opts['headers']);
 		}
 
diff --git a/src/Util/HTTPSignature.php b/src/Util/HTTPSignature.php
index 2b98b1a32e..e3244fade3 100644
--- a/src/Util/HTTPSignature.php
+++ b/src/Util/HTTPSignature.php
@@ -411,7 +411,7 @@ class HTTPSignature
 	 */
 	public static function fetchRaw($request, $uid = 0, $binary = false, $opts = [])
 	{
-		$headers = [];
+		$header = [];
 
 		if (!empty($uid)) {
 			$owner = User::getOwnerDataById($uid);
@@ -431,21 +431,21 @@ class HTTPSignature
 			$path = parse_url($request, PHP_URL_PATH);
 			$date = DateTimeFormat::utcNow(DateTimeFormat::HTTP);
 
-			$headers = ['Date: ' . $date, 'Host: ' . $host];
+			$header = ['Date: ' . $date, 'Host: ' . $host];
 
 			$signed_data = "(request-target): get " . $path . "\ndate: ". $date . "\nhost: " . $host;
 
 			$signature = base64_encode(Crypto::rsaSign($signed_data, $owner['uprvkey'], 'sha256'));
 
-			$headers[] = 'Signature: keyId="' . $owner['url'] . '#main-key' . '",algorithm="rsa-sha256",headers="(request-target) date host",signature="' . $signature . '"';
+			$header[] = 'Signature: keyId="' . $owner['url'] . '#main-key' . '",algorithm="rsa-sha256",headers="(request-target) date host",signature="' . $signature . '"';
 		}
 
 		if (!empty($opts['accept_content'])) {
-			$headers[] = 'Accept: ' . $opts['accept_content'];
+			$header[] = 'Accept: ' . $opts['accept_content'];
 		}
 
 		$curl_opts = $opts;
-		$curl_opts['header'] = $headers;
+		$curl_opts['header'] = $header;
 
 		if ($opts['nobody']) {
 			$curlResult = DI::httpRequest()->head($request, $curl_opts);