diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
index 8f477e3..8bc6328 100644
--- a/system/database/DB_query_builder.php
+++ b/system/database/DB_query_builder.php
@@ -987,7 +987,7 @@
 				$v .= sprintf($this->_like_escape_str, $this->_like_escape_chr);
 			}
 
-			$qb_where = array('condition' => "{$prefix} {$k} {$not} LIKE", 'value' => $v, 'escape' => $escape);
+			$qb_where = array('condition' => "{$prefix} {$k} {$not} LIKE {$v}", 'value' => NULL, 'escape' => $escape);
 			$this->qb_where[] = $qb_where;
 			if ($this->qb_caching === TRUE)
 			{
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index d0989da..7f2a835 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -8,6 +8,11 @@
 Release Date: Not Released
 
 
+Bug fixes for 3.1.9
+-------------------
+
+-  Fixed a regression (#5448) - :doc:`Query Builder <database/query_builder>` methods ``like()``, ``or_like()`` (and siblings) didn't apply *dbprefix* or identifier escaping.
+
 Version 3.1.8
 =============