diff --git a/mod/glossary/lib.php b/mod/glossary/lib.php
index 98756d76212..84055d4d35b 100644
--- a/mod/glossary/lib.php
+++ b/mod/glossary/lib.php
@@ -3820,10 +3820,10 @@ function glossary_get_entries_by_search($glossary, $context, $query, $fullsearch
                                         $options = array()) {
     global $DB, $USER;
 
-    // Remove too little terms.
+    // Clean terms.
     $terms = explode(' ', $query);
     foreach ($terms as $key => $term) {
-        if (strlen(trim($term, '+-')) < 2) {
+        if (strlen(trim($term, '+-')) < 1) {
             unset($terms[$key]);
         }
     }