diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index 507067f..4adf943 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -1237,7 +1237,7 @@
 
 		// wrap each line with the shebang, charset, and transfer encoding
 		// the preceding space on successive lines is required for header "folding"
-		return trim(preg_replace('/^(.*?)(\n|\r)*$/m', ' =?'.$this->charset.'?Q?$1?=$2', $output.$temp));
+		return trim(preg_replace('/^(.*?)(\r*)$/m', ' =?'.$this->charset.'?Q?$1?=$2', $output.$temp));
 	}
 
 	// --------------------------------------------------------------------
@@ -1861,4 +1861,4 @@
 }
 
 /* End of file Email.php */
-/* Location: ./system/libraries/Email.php */
\ No newline at end of file
+/* Location: ./system/libraries/Email.php */