Undefined class constant 'FOLLOW_SYMLINKS - symfony

after installing symfony 2.6 and when executing an error message is displayed:
FatalErrorException in DirectoryResource.php line 82:
Error: Undefined class constant 'FOLLOW_SYMLINKS'
the error is in the bundle: kriswallsmith
Please help me.
thank you in advance

Which versio of PHP are you running under? 5.2?
This sounds awfully similar to this issue report: https://github.com/caefer/sfImageTransformExtraPlugin/issues/5

The class constant, FOLLOW_SYMLINKS, is part of the RecursiveDirectoryIterator, which according to the PHP.net manual page, was added in 5.3.1 and also 5.2.11. At least version 5.3.9 is usually recommended or required by various frameworks because of various issues in prior versions.
The package is "kriswallsmith/assetic"

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