diff --git a/src/Curl/Curl.php b/src/Curl/Curl.php
index f0e12c1..49df651 100644
--- a/src/Curl/Curl.php
+++ b/src/Curl/Curl.php
@@ -488,7 +488,8 @@ class Curl
         $raw_headers = preg_split('/\r\n/', $raw_headers, null, PREG_SPLIT_NO_EMPTY);
         $http_headers = new CaseInsensitiveArray();
 
-        for ($i = 1; $i < count($raw_headers); $i++) {
+        $raw_headers_count = count($raw_headers);
+        for ($i = 1; $i < $raw_headers_count; $i++) {
             list($key, $value) = explode(':', $raw_headers[$i], 2);
             $key = trim($key);
             $value = trim($value);
diff --git a/src/Curl/MultiCurl.php b/src/Curl/MultiCurl.php
index 892ea0f..e84efb7 100644
--- a/src/Curl/MultiCurl.php
+++ b/src/Curl/MultiCurl.php
@@ -46,7 +46,6 @@ class MultiCurl
         $curl = new Curl();
         $curl->setURL($url);
 
-        $callback = false;
         if (is_callable($mixed_filename)) {
             $callback = $mixed_filename;
             $curl->download_complete_function = $callback;