diff --git a/phpBB/includes/acp/acp_users.php b/phpBB/includes/acp/acp_users.php
index 0ee6452ada..76b6275954 100644
--- a/phpBB/includes/acp/acp_users.php
+++ b/phpBB/includes/acp/acp_users.php
@@ -2073,7 +2073,10 @@ class acp_users
 				// Replace "error" strings with their real, localised form
 				$error = array_map(array($user, 'lang'), $error);
 
-				$decoded_message = generate_text_for_edit($signature, $bbcode_uid, $bbcode_bitfield);
+				if ($request->is_set_post('preview'))
+				{
+					$decoded_message = generate_text_for_edit($signature, $bbcode_uid, $bbcode_bitfield);
+				}
 
 				/** @var \phpbb\controller\helper $controller_helper */
 				$controller_helper = $phpbb_container->get('controller.helper');
diff --git a/phpBB/includes/ucp/ucp_profile.php b/phpBB/includes/ucp/ucp_profile.php
index 4ac8e0f17d..5c0b792f6f 100644
--- a/phpBB/includes/ucp/ucp_profile.php
+++ b/phpBB/includes/ucp/ucp_profile.php
@@ -544,7 +544,10 @@ class ucp_profile
 				// Replace "error" strings with their real, localised form
 				$error = array_map(array($user, 'lang'), $error);
 
-				$decoded_message = generate_text_for_edit($signature, $bbcode_uid, $bbcode_bitfield);
+				if ($request->is_set_post('preview'))
+				{
+					$decoded_message = generate_text_for_edit($signature, $bbcode_uid, $bbcode_flags);
+				}
 
 				/** @var \phpbb\controller\helper $controller_helper */
 				$controller_helper = $phpbb_container->get('controller.helper');