Title: W3C Markup Validation Error
Last modified: August 30, 2016

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# W3C Markup Validation Error

 *  [neilshealthymeals](https://wordpress.org/support/users/neilshealthymeals/)
 * (@neilshealthymeals)
 * [10 years, 5 months ago](https://wordpress.org/support/topic/w3c-markup-validation-error-1/)
 * Hi,
 * I just ran the W3C Markup Validator and it brought up this issue in my blog:-
 * Error Line 2, Column 167: there is no attribute “prefix”
    …ww.addthis.com/help/
   api-spec” prefix=”og: [http://ogp.me/ns#](http://ogp.me/ns#) fb: [http://ogp.me…](http://ogp.me…)
 * How can I fix this?
 * Thanks
 * Neil
 * [https://wordpress.org/plugins/addthis/](https://wordpress.org/plugins/addthis/)

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## Tags

 * [validation](https://wordpress.org/support/topic-tag/validation/)
 * [W3C](https://wordpress.org/support/topic-tag/w3c/)

 * 0 replies
 * 1 participant
 * Last reply from: [neilshealthymeals](https://wordpress.org/support/users/neilshealthymeals/)
 * Last activity: [10 years, 5 months ago](https://wordpress.org/support/topic/w3c-markup-validation-error-1/)
 * Status: not resolved