diff --git a/src/libsystemd-network/dhcp-internal.h b/src/libsystemd-network/dhcp-internal.h
index c0cfa83471e..eb4a6cdce28 100644
--- a/src/libsystemd-network/dhcp-internal.h
+++ b/src/libsystemd-network/dhcp-internal.h
@@ -30,7 +30,7 @@
 #include "dhcp-protocol.h"
 
 int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link, uint32_t xid);
-int dhcp_network_bind_udp_socket(int index, be32_t address, uint16_t port);
+int dhcp_network_bind_udp_socket(be32_t address, uint16_t port);
 int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link,
                                  const void *packet, size_t len);
 int dhcp_network_send_udp_socket(int s, be32_t address, uint16_t port,
diff --git a/src/libsystemd-network/dhcp-network.c b/src/libsystemd-network/dhcp-network.c
index 902c9d9be2c..722f1b18b3a 100644
--- a/src/libsystemd-network/dhcp-network.c
+++ b/src/libsystemd-network/dhcp-network.c
@@ -96,7 +96,7 @@ int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link, uint32_t
         return s;
 }
 
-int dhcp_network_bind_udp_socket(int index, be32_t address, uint16_t port)
+int dhcp_network_bind_udp_socket(be32_t address, uint16_t port)
 {
         int s;
         union sockaddr_union src = {
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 2ddb9ad1dca..ab9f68d5286 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -770,8 +770,7 @@ static int client_timeout_t1(sd_event_source *s, uint64_t usec,
         client->state = DHCP_STATE_RENEWING;
         client->attempt = 1;
 
-        r = dhcp_network_bind_udp_socket(client->index,
-                                         client->lease->address,
+        r = dhcp_network_bind_udp_socket(client->lease->address,
                                          DHCP_PORT_CLIENT);
         if (r < 0) {
                 client_stop(client, r);
diff --git a/src/libsystemd-network/test-dhcp-client.c b/src/libsystemd-network/test-dhcp-client.c
index 83dd6194076..599bda1a5ee 100644
--- a/src/libsystemd-network/test-dhcp-client.c
+++ b/src/libsystemd-network/test-dhcp-client.c
@@ -204,7 +204,7 @@ int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link, uint32_t
         return test_fd[0];
 }
 
-int dhcp_network_bind_udp_socket(int index, be32_t address, uint16_t port)
+int dhcp_network_bind_udp_socket(be32_t address, uint16_t port)
 {
         return 0;
 }