diff --git a/EmailValidator/Parser/Parser.php b/EmailValidator/Parser/Parser.php
index cc9e26b..d0673b9 100644
--- a/EmailValidator/Parser/Parser.php
+++ b/EmailValidator/Parser/Parser.php
@@ -170,7 +170,7 @@ protected function escaped()
     {
         $previous = $this->lexer->getPrevious();
 
-        if ($previous['type'] === EmailLexer::S_BACKSLASH
+        if ($previous && $previous['type'] === EmailLexer::S_BACKSLASH
             &&
             $this->lexer->token['type'] !== EmailLexer::GENERIC
         ) {