diff --git a/src/WordPress/AsyncHttp/Client.php b/src/WordPress/AsyncHttp/Client.php
index dd3dec0c..8763c835 100644
--- a/src/WordPress/AsyncHttp/Client.php
+++ b/src/WordPress/AsyncHttp/Client.php
@@ -192,7 +192,7 @@ public function process_queue() {
 
 		foreach ( $streams as $k => $stream ) {
 			$request                            = $enqueued[ $k ];
-			$total                              = $response_headers[ $k ]['headers']['content-length'];
+			$total                              = $response_headers[ $k ]['headers']['content-length'] ?? null;
 			$this->requests[ $request ]->state  = RequestInfo::STATE_STREAMING;
 			$this->requests[ $request ]->stream = stream_monitor_progress(
 				$stream,
diff --git a/src/WordPress/AsyncHttp/async_http_streams.php b/src/WordPress/AsyncHttp/async_http_streams.php
index 71d4581b..24a63839 100644
--- a/src/WordPress/AsyncHttp/async_http_streams.php
+++ b/src/WordPress/AsyncHttp/async_http_streams.php
@@ -219,18 +219,17 @@ function stream_http_prepare_request_bytes( $url ) {
 	$parts   = parse_url( $url );
 	$host    = $parts['host'];
 	$path    = $parts['path'] . ( isset( $parts['query'] ) ? '?' . $parts['query'] : '' );
-	$request = <<<REQUEST
-GET $path HTTP/1.1
-Host: $host
-User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36
-Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
-Accept-Language: en-US,en;q=0.9
-Connection: close
-REQUEST;
+	$request_parts = array(
+		"GET $path HTTP/1.0",
+		"Host: $host",
+		"User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36",
+		"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
+		"Accept-Language: en-US,en;q=0.9",
+		"Connection: close"
+	);
 
 	// @TODO: Add support for Accept-Encoding: gzip
-
-	return str_replace( "\n", "\r\n", $request ) . "\r\n\r\n";
+	return implode( "\r\n", $request_parts ) . "\r\n\r\n";
 }
 
 /**