diff --git a/src/platform/nm-platform.c b/src/platform/nm-platform.c
index 230d7580ad..2b89836241 100644
--- a/src/platform/nm-platform.c
+++ b/src/platform/nm-platform.c
@@ -256,6 +256,8 @@ nm_platform_sysctl_set_ip6_hop_limit_safe (NMPlatform *self, const char *iface,
 	const char *path;
 	gint64 cur;
 
+	_CHECK_SELF (self, klass, FALSE);
+
 	/* the hop-limit provided via RA is uint8. */
 	if (value > 0xFF)
 		return FALSE;