diff --git a/phpBB/install/install_install.php b/phpBB/install/install_install.php
index 7558fde944..ad84155585 100644
--- a/phpBB/install/install_install.php
+++ b/phpBB/install/install_install.php
@@ -128,7 +128,7 @@ class install_install extends module
 			'BODY'		=> $lang['REQUIREMENTS_EXPLAIN'],
 		));
 
-		$passed = array('php' => false, 'db' => false, 'files' => false, 'pcre' => false, 'imagesize' => false,);
+		$passed = array('php' => false, 'db' => false, 'files' => false, 'pcre' => false, 'imagesize' => false, 'json' => false,);
 
 		// Test for basic PHP settings
 		$template->assign_block_vars('checks', array(
@@ -244,6 +244,26 @@ class install_install extends module
 			'S_EXPLAIN'		=> true,
 			'S_LEGEND'		=> false,
 		));
+		
+		// Check for php json support
+		if (@extension_loaded('json'))
+		{
+			$passed['json'] = true;
+			$result = '<strong style="color:green">' . $lang['YES'] . '</strong>';
+		}
+		else
+		{
+			$result = '<strong style="color:red">' . $lang['NO'] . '</strong>';
+		}
+
+		$template->assign_block_vars('checks', array(
+			'TITLE'			=> $lang['PHP_JSON_SUPPORT'],
+			'TITLE_EXPLAIN'	=> $lang['PHP_JSON_SUPPORT_EXPLAIN'],
+			'RESULT'		=> $result,
+
+			'S_EXPLAIN'		=> true,
+			'S_LEGEND'		=> false,
+		));
 
 /**
 *		Better not enabling and adding to the loaded extensions due to the specific requirements needed
diff --git a/phpBB/language/en/install.php b/phpBB/language/en/install.php
index ca6045a921..29664ae5f0 100644
--- a/phpBB/language/en/install.php
+++ b/phpBB/language/en/install.php
@@ -292,6 +292,8 @@ $lang = array_merge($lang, array(
 	'PCRE_UTF_SUPPORT_EXPLAIN'		=> 'phpBB will <strong>not</strong> run if your PHP installation is not compiled with UTF-8 support in the PCRE extension.',
 	'PHP_GETIMAGESIZE_SUPPORT'			=> 'PHP function getimagesize() is available',
 	'PHP_GETIMAGESIZE_SUPPORT_EXPLAIN'	=> '<strong>Required</strong> - In order for phpBB to function correctly, the getimagesize function needs to be available.',
+	'PHP_JSON_SUPPORT'        		=> 'PHP JSON support',
+	'PHP_JSON_SUPPORT_EXPLAIN'    	=> '<strong>Required</strong> - In order for phpBB to function correctly, the PHP JSON extension needs to be available.',
 	'PHP_OPTIONAL_MODULE'			=> 'Optional modules',
 	'PHP_OPTIONAL_MODULE_EXPLAIN'	=> '<strong>Optional</strong> - These modules or applications are optional. However, if they are available they will enable extra features.',
 	'PHP_SUPPORTED_DB'				=> 'Supported databases',