diff --git a/src/nm-core-utils.h b/src/nm-core-utils.h
index e7211038de..8b5e69916d 100644
--- a/src/nm-core-utils.h
+++ b/src/nm-core-utils.h
@@ -479,6 +479,13 @@ nm_utils_ip4_address_is_link_local (in_addr_t addr)
 	return (addr & NM_IPV4LL_NETMASK) == NM_IPV4LL_NETWORK;
 }
 
+static inline gboolean
+nm_utils_ip4_address_is_zeronet (in_addr_t network)
+{
+	/* Same as ipv4_is_zeronet() from kernel's include/linux/in.h. */
+	return (network & htonl (0xFF000000u)) == htonl (0x00000000u);
+}
+
 /*****************************************************************************/
 
 const char *nm_utils_dnsmasq_status_to_string (int status, char *dest, gsize size);