diff --git a/java/ql/lib/semmle/code/java/frameworks/ThreadLocal.qll b/java/ql/lib/semmle/code/java/frameworks/ThreadLocal.qll
index 4daf9eb84a6..826eed8dffc 100644
--- a/java/ql/lib/semmle/code/java/frameworks/ThreadLocal.qll
+++ b/java/ql/lib/semmle/code/java/frameworks/ThreadLocal.qll
@@ -1,3 +1,5 @@
+/** Definitions related to `java.lang.ThreadLocal`. */
+
 import java
 private import semmle.code.java.dataflow.DataFlow
 private import semmle.code.java.dataflow.FlowSteps