diff --git a/meson.build b/meson.build
index 5ddec8afd7..81f9f7b328 100644
--- a/meson.build
+++ b/meson.build
@@ -2663,6 +2663,7 @@ config_host_data.set('CONFIG_SYNCFS', cc.has_function('syncfs'))
 config_host_data.set('CONFIG_SYNC_FILE_RANGE', cc.has_function('sync_file_range'))
 config_host_data.set('CONFIG_TIMERFD', cc.has_function('timerfd_create'))
 config_host_data.set('CONFIG_GETLOADAVG', cc.has_function('getloadavg'))
+config_host_data.set('CONFIG_ARPA_INET_64', cc.has_function('htonll'))
 config_host_data.set('HAVE_COPY_FILE_RANGE', cc.has_function('copy_file_range'))
 config_host_data.set('HAVE_GETIFADDRS', cc.has_function('getifaddrs'))
 config_host_data.set('HAVE_GLIB_WITH_SLICE_ALLOCATOR', glib_has_gslice)
diff --git a/migration/rdma.c b/migration/rdma.c
index 2d839fce6c..337b415889 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -238,7 +238,7 @@ static const char *control_desc(unsigned int rdma_control)
     return strs[rdma_control];
 }
 
-#if !defined(htonll)
+#if !defined(CONFIG_ARPA_INET_64)
 static uint64_t htonll(uint64_t v)
 {
     union { uint32_t lv[2]; uint64_t llv; } u;
@@ -246,9 +246,7 @@ static uint64_t htonll(uint64_t v)
     u.lv[1] = htonl(v & 0xFFFFFFFFULL);
     return u.llv;
 }
-#endif
 
-#if !defined(ntohll)
 static uint64_t ntohll(uint64_t v)
 {
     union { uint32_t lv[2]; uint64_t llv; } u;