diff --git a/phpseclib/File/ASN1.php b/phpseclib/File/ASN1.php
index 374311c6..1f9f177f 100644
--- a/phpseclib/File/ASN1.php
+++ b/phpseclib/File/ASN1.php
@@ -1461,10 +1461,10 @@ abstract class ASN1
         $temp = strlen($str) <= ini_get('pcre.backtrack_limit') ?
             preg_replace('#.*?^-+[^-]+-+[\r\n ]*$#ms', '', $str, 1) :
             $str;
-        // remove the -----BEGIN CERTIFICATE----- and -----END CERTIFICATE----- stuff
-        $temp = preg_replace('#-+[^-]+-+#', '', $temp);
         // remove new lines
         $temp = str_replace(["\r", "\n", ' '], '', $temp);
+        // remove the -----BEGIN CERTIFICATE----- and -----END CERTIFICATE----- stuff
+        $temp = preg_replace('#^-+[^-]+-+|-+[^-]+-+$#', '', $temp);
         $temp = preg_match('#^[a-zA-Z\d/+]*={0,2}$#', $temp) ? Base64::decode($temp) : false;
         return $temp != false ? $temp : $str;
     }
diff --git a/tests/Unit/File/X509/X509Test.php b/tests/Unit/File/X509/X509Test.php
index 770f443c..3087fdb6 100644
--- a/tests/Unit/File/X509/X509Test.php
+++ b/tests/Unit/File/X509/X509Test.php
@@ -1061,4 +1061,119 @@ ut3+b2Xvzq8yzmHMFtLIJ6Afu1jJpqD82BUAFcvi5vhnP8M7b974R18WCOpgNQvXDI+2/8ZINeU=
 
         $this->assertFalse($r);
     }
+
+    /**
+     * @group github1542
+     */
+    public function testMultiCertPEM()
+    {
+        $a = '-----BEGIN CERTIFICATE-----
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+Z2OXFTCG5ORjPUOyMGjxzjEPZWmTOG+gqNOc0HKXbuBAsGZbK4dind+YdZE=
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+qzFkAKWjJj4KjfrbZX4C0Spfxw==
+-----END CERTIFICATE-----';
+
+        $x509 = new X509();
+        $r = $x509->loadX509($a);
+
+        $this->assertFalse($r);
+    }
 }