diff --git a/javascript/ql/src/Performance/ReDoS.ql b/javascript/ql/src/Performance/ReDoS.ql
index 9afd50f7a29..55765e378c5 100644
--- a/javascript/ql/src/Performance/ReDoS.ql
+++ b/javascript/ql/src/Performance/ReDoS.ql
@@ -222,7 +222,7 @@ abstract class CharacterClass extends InputSymbol {
   /**
    * Gets a character matched by this character class.
    */
-  string choose() { result = getARelevantChar() }
+  string choose() { result = getARelevantChar() and matches(result) }
 }
 
 /**
diff --git a/javascript/ql/test/query-tests/Performance/ReDoS/tst.js b/javascript/ql/test/query-tests/Performance/ReDoS/tst.js
index 37fb4c2d6e9..d34237d5176 100644
--- a/javascript/ql/test/query-tests/Performance/ReDoS/tst.js
+++ b/javascript/ql/test/query-tests/Performance/ReDoS/tst.js
@@ -258,3 +258,6 @@ var bad57 = /^([^>a]+)*(>|$)/;
 
 // NOT GOOD
 var bad58 = /(\n\s*)+$/;
+
+// GOOD
+var good26 = /([^\\\]]+)*/
\ No newline at end of file