diff --git a/phpBB/docs/CHANGELOG.html b/phpBB/docs/CHANGELOG.html
index 2f78307315..827efafe6c 100644
--- a/phpBB/docs/CHANGELOG.html
+++ b/phpBB/docs/CHANGELOG.html
@@ -287,7 +287,8 @@ p a {
 		<li>[Fix] Added post anchor to links in default warning message (Bug #12489)</li>
 		<li>[Fix] Allow 5 digits in editing time fields (Bug #12489)</li>
 		<li>[Fix] MS SQL DBAL drivers now write over extension limitations, they are too low for most installations (Bug #12415)</li>
-</ul>
+		<li>[Fix] Fix sorting by author on "unanswered posts" (Bug #12545)</li>
+ul>
 
 	</div>
 	<a href="#top">Top</a>
diff --git a/phpBB/search.php b/phpBB/search.php
index ed1b43fd9e..4b2563dbe5 100644
--- a/phpBB/search.php
+++ b/phpBB/search.php
@@ -299,14 +299,14 @@ if ($keywords || $author || $author_id || $search_id || $submit)
 					$last_post_time = '';
 				}
 
+
+				if ($sort_key == 'a')
+				{
+					$sort_join = USERS_TABLE . ' u, ';
+					$sql_sort = ' AND u.user_id = p.poster_id ' . $sql_sort;
+				}
 				if ($show_results == 'posts')
 				{
-					if ($sort_key == 'a')
-					{
-						$sort_join = USERS_TABLE . ' u, ';
-						$sql_sort = ' AND u.user_id = p.poster_id ' . $sql_sort;
-					}
-
 					$sql = "SELECT p.post_id
 						FROM $sort_join" . POSTS_TABLE . ' p, ' . TOPICS_TABLE . " t
 						WHERE t.topic_replies = 0