diff --git a/src/Data/Hanzi.php b/src/Data/Hanzi.php
index 00cf03708..a3ff758d9 100644
--- a/src/Data/Hanzi.php
+++ b/src/Data/Hanzi.php
@@ -188,7 +188,7 @@ final class Hanzi extends QRDataModeAbstract{
 			$length--;
 		}
 
-		return mb_convert_encoding(implode($buffer), mb_internal_encoding(), self::ENCODING);
+		return mb_convert_encoding(implode('', $buffer), mb_internal_encoding(), self::ENCODING);
 	}
 
 }
diff --git a/src/Data/Kanji.php b/src/Data/Kanji.php
index 37450f850..bd3054cf4 100644
--- a/src/Data/Kanji.php
+++ b/src/Data/Kanji.php
@@ -174,7 +174,7 @@ final class Kanji extends QRDataModeAbstract{
 			$length--;
 		}
 
-		return mb_convert_encoding(implode($buffer), mb_internal_encoding(), self::ENCODING);
+		return mb_convert_encoding(implode('', $buffer), mb_internal_encoding(), self::ENCODING);
 	}
 
 }