diff --git a/src/main/java/io/r2dbc/postgresql/BoundedStatementCache.java b/src/main/java/io/r2dbc/postgresql/BoundedStatementCache.java
index 2d6e2121..0d6dd5f6 100644
--- a/src/main/java/io/r2dbc/postgresql/BoundedStatementCache.java
+++ b/src/main/java/io/r2dbc/postgresql/BoundedStatementCache.java
@@ -137,7 +137,8 @@ Collection<String> getCachedStatementNames() {
     /**
      * Synchronized cache access: Retrieve statement name by key.
      *
-     * @param key
+     * @param key Cache key
+     * @see CacheKey
      * @return statement name by key
      */
     @Nullable