diff --git a/phpBB/language/en/cli.php b/phpBB/language/en/cli.php
index f6d72f4aba..7e3ae1a5a8 100644
--- a/phpBB/language/en/cli.php
+++ b/phpBB/language/en/cli.php
@@ -123,6 +123,7 @@ $lang = array_merge($lang, array(
 	'CLI_EXTENSION_UPDATE_FAILURE'		=> 'Could not update extension %s',
 	'CLI_EXTENSION_UPDATE_SUCCESS'		=> 'Successfully updated extension %s',
 	'CLI_EXTENSION_NOT_FOUND'			=> 'No extensions were found.',
+	'CLI_EXTENSION_NOT_ENABLEABLE'		=> 'Extension %s is not enableable.',
 	'CLI_EXTENSIONS_AVAILABLE'			=> 'Available',
 	'CLI_EXTENSIONS_DISABLED'			=> 'Disabled',
 	'CLI_EXTENSIONS_ENABLED'			=> 'Enabled',
diff --git a/phpBB/phpbb/install/module/install_finish/task/install_extensions.php b/phpBB/phpbb/install/module/install_finish/task/install_extensions.php
index 5cf91c3a52..47ea156c66 100644
--- a/phpBB/phpbb/install/module/install_finish/task/install_extensions.php
+++ b/phpBB/phpbb/install/module/install_finish/task/install_extensions.php
@@ -118,6 +118,14 @@ class install_extensions extends \phpbb\install\task_base
 
 			try
 			{
+				$extension = $this->extension_manager->get_extension($ext_name);
+
+				if (!$extension->is_enableable())
+				{
+					$this->iohandler->add_log_message(array('CLI_EXTENSION_NOT_ENABLEABLE', $ext_name));
+					continue;
+				}
+
 				$this->extension_manager->enable($ext_name);
 				$extensions = $this->get_extensions();