6 files changed, 6 insertions, 6 deletions
diff --git a/view/php/choklet.php b/view/php/choklet.php
index 712e8b1c3..5f2303e77 100644
--- a/view/php/choklet.php
+++ b/view/php/choklet.php
@@ -1,5 +1,5 @@
 <!DOCTYPE html >
-<html>
+<html prefix="og: http://ogp.me/ns#">
 <head>
   <title><?php if(x($page,'title')) echo $page['title']; ?></title>
   <script>var baseurl="<?php echo $a->get_baseurl(); ?>";</script>
diff --git a/view/php/default.php b/view/php/default.php
index cf6b25d90..4a7c1ea19 100644
--- a/view/php/default.php
+++ b/view/php/default.php
@@ -1,5 +1,5 @@
 <!DOCTYPE html >
-<html>
+<html prefix="og: http://ogp.me/ns#">
 <head>
   <title><?php if(x($page,'title')) echo $page['title'] ?></title>
   <script>var baseurl="<?php echo $a->get_baseurl() ?>";</script>
diff --git a/view/php/full.php b/view/php/full.php
index 99653c06d..bc3b2ed87 100644
--- a/view/php/full.php
+++ b/view/php/full.php
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html prefix="og: http://ogp.me/ns#">
 <head>
   <title><?php if(x($page,'title')) echo $page['title'] ?></title>
   <script>var baseurl="<?php echo $a->get_baseurl() ?>";</script>
diff --git a/view/php/minimal.php b/view/php/minimal.php
index a8c693985..ade2a0cb7 100644
--- a/view/php/minimal.php
+++ b/view/php/minimal.php
@@ -1,5 +1,5 @@
 <!DOCTYPE html >
-<html>
+<html prefix="og: http://ogp.me/ns#">
 <head>
   <title><?php if(x($page,'title')) echo $page['title'] ?></title>
   <script>var baseurl="<?php echo $a->get_baseurl() ?>";</script>
diff --git a/view/php/redable.php b/view/php/redable.php
index dfa99ccb3..0dcba77d2 100644
--- a/view/php/redable.php
+++ b/view/php/redable.php
@@ -1,5 +1,5 @@
 <!DOCTYPE html >
-<html>
+<html prefix="og: http://ogp.me/ns#">
 <head>
   <title><?php if(x($page,'title')) echo $page['title'] ?></title>
   <script>var baseurl="<?php echo $a->get_baseurl() ?>";</script>
diff --git a/view/php/zen.php b/view/php/zen.php
index 5b89e9c32..a96cf722f 100644
--- a/view/php/zen.php
+++ b/view/php/zen.php
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html prefix="og: http://ogp.me/ns#">
 <head>
   <title><?php if(x($page,'title')) echo $page['title'] ?></title>
   <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1">