diff --git a/phpBB/adm/style/acp_ext_delete_data.html b/phpBB/adm/style/acp_ext_delete_data.html
index cc9ad4e416..80145e4601 100644
--- a/phpBB/adm/style/acp_ext_delete_data.html
+++ b/phpBB/adm/style/acp_ext_delete_data.html
@@ -13,7 +13,7 @@
 			<p>{{ MIGRATOR_ERROR }}</p>
 			<p><a href="{{ U_RETURN }}">{{ lang('RETURN_TO_EXTENSION_LIST') }}</a></p>
 		</div>
-	{% elseif PRE %}
+	{% elseif S_PRE_STEP %}
 		<div class="errorbox">
 			<p>{{ CONFIRM_MESSAGE }}</p>
 		</div>
diff --git a/phpBB/adm/style/acp_ext_disable.html b/phpBB/adm/style/acp_ext_disable.html
index 066795007b..30b2525810 100644
--- a/phpBB/adm/style/acp_ext_disable.html
+++ b/phpBB/adm/style/acp_ext_disable.html
@@ -7,7 +7,7 @@
 	<p>{{ lang('EXTENSIONS_EXPLAIN') }}</p>
 	<p>{{ lang('EXTENSION_DISABLE_EXPLAIN') }}</p>
 
-	{% if PRE %}
+	{% if S_PRE_STEP %}
 		<fieldset>
 			<h2>{{ lang('CONFIRM') }}</h2>
 			<p>{{ CONFIRM_MESSAGE }}</p>
diff --git a/phpBB/adm/style/acp_ext_enable.html b/phpBB/adm/style/acp_ext_enable.html
index 4a2ceaadc4..0dd2ce01d3 100644
--- a/phpBB/adm/style/acp_ext_enable.html
+++ b/phpBB/adm/style/acp_ext_enable.html
@@ -13,7 +13,7 @@
 			<p>{{ MIGRATOR_ERROR }}</p>
 			<p><a href="{{ U_RETURN }}">{{ lang('RETURN_TO_EXTENSION_LIST') }}</a></p>
 		</div>
-	{% elseif PRE %}
+	{% elseif S_PRE_STEP %}
 		<fieldset>
 			<h2>{{ lang('CONFIRM') }}</h2>
 			<p>{{ CONFIRM_MESSAGE }}</p>
diff --git a/phpBB/includes/acp/acp_extensions.php b/phpBB/includes/acp/acp_extensions.php
index d7c6ca5921..f8124f2206 100644
--- a/phpBB/includes/acp/acp_extensions.php
+++ b/phpBB/includes/acp/acp_extensions.php
@@ -183,7 +183,7 @@ class acp_extensions
 				$this->tpl_name = 'acp_ext_enable';
 
 				$this->template->assign_vars(array(
-					'PRE'				=> true,
+					'S_PRE_STEP'		=> true,
 					'CONFIRM_MESSAGE'	=> $this->user->lang('EXTENSION_ENABLE_CONFIRM', $md_manager->get_metadata('display-name')),
 					'U_ENABLE'			=> $this->u_action . '&amp;action=enable&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('enable.' . $ext_name),
 				));
@@ -248,7 +248,7 @@ class acp_extensions
 				$this->tpl_name = 'acp_ext_disable';
 
 				$this->template->assign_vars(array(
-					'PRE'				=> true,
+					'S_PRE_STEP'		=> true,
 					'CONFIRM_MESSAGE'	=> $this->user->lang('EXTENSION_DISABLE_CONFIRM', $md_manager->get_metadata('display-name')),
 					'U_DISABLE'			=> $this->u_action . '&amp;action=disable&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('disable.' . $ext_name),
 				));
@@ -287,7 +287,7 @@ class acp_extensions
 				$this->tpl_name = 'acp_ext_delete_data';
 
 				$this->template->assign_vars(array(
-					'PRE'				=> true,
+					'S_PRE_STEP'		=> true,
 					'CONFIRM_MESSAGE'	=> $this->user->lang('EXTENSION_DELETE_DATA_CONFIRM', $md_manager->get_metadata('display-name')),
 					'U_PURGE'			=> $this->u_action . '&amp;action=delete_data&amp;ext_name=' . urlencode($ext_name) . '&amp;hash=' . generate_link_hash('delete_data.' . $ext_name),
 				));