diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter_setsockopt.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter_setsockopt.c
index 85babb0487b3..59a9b6e02452 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_iter_setsockopt.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter_setsockopt.c
@@ -95,7 +95,7 @@ static unsigned short get_local_port(int fd)
 	struct sockaddr_in6 addr;
 	socklen_t addrlen = sizeof(addr);
 
-	if (!getsockname(fd, &addr, &addrlen))
+	if (!getsockname(fd, (struct sockaddr *)&addr, &addrlen))
 		return ntohs(addr.sin6_port);
 
 	return 0;