diff --git a/phpseclib/File/ASN1.php b/phpseclib/File/ASN1.php
index a486f715..0ceac5f5 100644
--- a/phpseclib/File/ASN1.php
+++ b/phpseclib/File/ASN1.php
@@ -1477,7 +1477,7 @@ abstract class ASN1
             $temp = $str;
         } else {
             $temp = preg_replace('#.*?^-+[^-]+-+[\r\n ]*$#ms', '', $str, 1);
-            $temp = preg_replace('#-+END.*[\r\n ]*.*#ms', '', $str, 1);
+            $temp = preg_replace('#-+END.*[\r\n ]*.*#ms', '', $temp, 1);
         }
         // remove new lines
         $temp = str_replace(["\r", "\n", ' '], '', $temp);