From ed87e634ed18429c2848d5492abc8fc722fe3e58 Mon Sep 17 00:00:00 2001
From: Michael <heluecht@pirati.ca>
Date: Wed, 18 Apr 2018 05:00:28 +0000
Subject: [PATCH] Avoid duplicated multibyte tags

---
 src/Protocol/PortableContact.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Protocol/PortableContact.php b/src/Protocol/PortableContact.php
index f7ea27d679..06c2636aca 100644
--- a/src/Protocol/PortableContact.php
+++ b/src/Protocol/PortableContact.php
@@ -1421,7 +1421,7 @@ class PortableContact
 			// Avoid duplicates
 			$tags = [];
 			foreach ($data->tags as $tag) {
-				$tag = strtolower($tag);
+				$tag = mb_strtolower($tag);
 				$tags[$tag] = $tag;
 			}