diff --git a/src/api/api_lib.c b/src/api/api_lib.c
index 3aed38d0..3e46be12 100644
--- a/src/api/api_lib.c
+++ b/src/api/api_lib.c
@@ -538,7 +538,7 @@ netconn_close(struct netconn *conn)
  *
  * @param conn the UDP netconn for which to change multicast addresses
  * @param multiaddr IP address of the multicast group to join or leave
- * @param interface the IP address of the network interface on which to send
+ * @param netif_addr the IP address of the network interface on which to send
  *                  the igmp message
  * @param join_or_leave flag whether to send a join- or leave-message
  * @return ERR_OK if the action was taken, any err_t on error
@@ -546,7 +546,7 @@ netconn_close(struct netconn *conn)
 err_t
 netconn_join_leave_group(struct netconn *conn,
                          struct ip_addr *multiaddr,
-                         struct ip_addr *interface,
+                         struct ip_addr *netif_addr,
                          enum netconn_igmp join_or_leave)
 {
   struct api_msg msg;
@@ -557,7 +557,7 @@ netconn_join_leave_group(struct netconn *conn,
   msg.function = do_join_leave_group;
   msg.msg.conn = conn;
   msg.msg.msg.jl.multiaddr = multiaddr;
-  msg.msg.msg.jl.interface = interface;
+  msg.msg.msg.jl.netif_addr = netif_addr;
   msg.msg.msg.jl.join_or_leave = join_or_leave;
   err = TCPIP_APIMSG(&msg);
 
diff --git a/src/api/api_msg.c b/src/api/api_msg.c
index c796769d..85ffa78a 100644
--- a/src/api/api_msg.c
+++ b/src/api/api_msg.c
@@ -1291,9 +1291,9 @@ do_join_leave_group(struct api_msg_msg *msg)
       if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
 #if LWIP_UDP
         if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
-          msg->err = igmp_joingroup(msg->msg.jl.interface, msg->msg.jl.multiaddr);
+          msg->err = igmp_joingroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
         } else {
-          msg->err = igmp_leavegroup(msg->msg.jl.interface, msg->msg.jl.multiaddr);
+          msg->err = igmp_leavegroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr);
         }
 #endif /* LWIP_UDP */
 #if (LWIP_TCP || LWIP_RAW)
diff --git a/src/include/lwip/api.h b/src/include/lwip/api.h
index 5fa45104..6aa900db 100644
--- a/src/include/lwip/api.h
+++ b/src/include/lwip/api.h
@@ -206,7 +206,7 @@ err_t   netconn_close(struct netconn *conn);
 
 #if LWIP_IGMP
 err_t   netconn_join_leave_group(struct netconn *conn, struct ip_addr *multiaddr,
-                                 struct ip_addr *interface, enum netconn_igmp join_or_leave);
+                                 struct ip_addr *netif_addr, enum netconn_igmp join_or_leave);
 #endif /* LWIP_IGMP */
 #if LWIP_DNS
 err_t   netconn_gethostbyname(const char *name, struct ip_addr *addr);
diff --git a/src/include/lwip/api_msg.h b/src/include/lwip/api_msg.h
index 845decc8..1efea033 100644
--- a/src/include/lwip/api_msg.h
+++ b/src/include/lwip/api_msg.h
@@ -93,7 +93,7 @@ struct api_msg_msg {
     /** used for do_join_leave_group */
     struct {
       struct ip_addr *multiaddr;
-      struct ip_addr *interface;
+      struct ip_addr *netif_addr;
       enum netconn_igmp join_or_leave;
     } jl;
 #endif /* LWIP_IGMP */