diff --git a/lib/krb5/cache.c b/lib/krb5/cache.c
index 239898b00..e2c5c8f2c 100644
--- a/lib/krb5/cache.c
+++ b/lib/krb5/cache.c
@@ -741,7 +741,7 @@ krb5_cc_get_principal(krb5_context context,
 
 /**
  * Start iterating over `id', `cursor' is initialized to the
- * beginning.
+ * beginning.  Caller must free the cursor with krb5_cc_end_seq_get().
  *
  * @return Return an error code or 0, see krb5_get_error_message().
  *