diff --git a/src/cookies.c b/src/cookies.c
index acc38f1a..6ddb9312 100644
--- a/src/cookies.c
+++ b/src/cookies.c
@@ -1447,6 +1447,7 @@ cookie_jar_delete (struct cookie_jar *jar)
 
 #ifdef HAVE_LIBPSL
   psl_free (psl);
+  psl = NULL;
 #endif
 }