diff --git a/.travis.yml b/.travis.yml
index c17e91b..cd6689d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,6 +26,7 @@ jobs:
       script:
         - php vendor/bin/php-cs-fixer fix --dry-run --diff
         - composer validate
+        - find OLE* -type f -name \*.php | xargs -n1 php -l
 
 cache:
   directories:
diff --git a/OLE.php b/OLE.php
index 1e4a4d2..e25b5ae 100755
--- a/OLE.php
+++ b/OLE.php
@@ -513,7 +513,7 @@ static function Asc2Ucs($ascii)
     {
         $rawname = '';
         for ($i = 0; $i < strlen($ascii); $i++) {
-            $rawname .= $ascii{$i} . "\x00";
+            $rawname .= $ascii[$i] . "\x00";
         }
         return $rawname;
     }
@@ -582,14 +582,14 @@ static function OLE2LocalDate($string)
         $factor = pow(2,32);
         $high_part = 0;
         for ($i = 0; $i < 4; $i++) {
-            list(, $high_part) = unpack('C', $string{(7 - $i)});
+            list(, $high_part) = unpack('C', $string[(7 - $i)]);
             if ($i < 3) {
                 $high_part *= 0x100;
             }
         }
         $low_part = 0;
         for ($i = 4; $i < 8; $i++) {
-            list(, $low_part) = unpack('C', $string{(7 - $i)});
+            list(, $low_part) = unpack('C', $string[(7 - $i)]);
             if ($i < 7) {
                 $low_part *= 0x100;
             }