diff --git a/net/decnet/dn_rules.c b/net/decnet/dn_rules.c
index 7f58b95b27d1..17a1932216d6 100644
--- a/net/decnet/dn_rules.c
+++ b/net/decnet/dn_rules.c
@@ -242,7 +242,7 @@ static u32 dn_fib_rule_default_pref(void)
 
 static void dn_fib_rule_flush_cache(void)
 {
-	dn_rt_cache_flush(0);
+	dn_rt_cache_flush(-1);
 }
 
 static struct fib_rules_ops dn_fib_rules_ops = {
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index fe29b98d6c8f..33083ad52e9f 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -300,7 +300,7 @@ static size_t fib4_rule_nlmsg_payload(struct fib_rule *rule)
 
 static void fib4_rule_flush_cache(void)
 {
-	rt_cache_flush(0);
+	rt_cache_flush(-1);
 }
 
 static struct fib_rules_ops fib4_rules_ops = {