diff --git a/ext/autocomplete/main.php b/ext/autocomplete/main.php
index abc7f09e..a58994c2 100644
--- a/ext/autocomplete/main.php
+++ b/ext/autocomplete/main.php
@@ -64,8 +64,10 @@ class AutoComplete extends Extension
             "
                 SELECT tag, count
                 FROM tags
-                WHERE LOWER(tag) LIKE LOWER(:search)
-                OR LOWER(tag) LIKE LOWER(:cat_search)
+                WHERE (
+                    LOWER(tag) LIKE LOWER(:search)
+                    OR LOWER(tag) LIKE LOWER(:cat_search)
+                )
                 AND count > 0
                 ORDER BY count DESC, tag ASC
                 $limitSQL