diff --git a/src/Transliterator.php b/src/Transliterator.php
index 989f3f4..e6ca7b3 100644
--- a/src/Transliterator.php
+++ b/src/Transliterator.php
@@ -116,7 +116,7 @@ private function getMap(): array
         $path = $customMaps[$lang][$map] ?? $vendorMapsPath.$lang.DIRECTORY_SEPARATOR.$map.'.php';
 
         if (!file_exists($path)) {
-            throw new \InvalidArgumentException("The transliteration map '${path}' doesn't exist");
+            throw new \InvalidArgumentException("The transliteration map '{$path}' doesn't exist");
         }
 
         /* @noinspection PhpIncludeInspection */