diff --git a/src/libnm-systemd-core/src/libsystemd-network/dhcp6-option.c b/src/libnm-systemd-core/src/libsystemd-network/dhcp6-option.c
index 6339cc4e67..4249f90de0 100644
--- a/src/libnm-systemd-core/src/libsystemd-network/dhcp6-option.c
+++ b/src/libnm-systemd-core/src/libsystemd-network/dhcp6-option.c
@@ -632,7 +632,7 @@ int dhcp6_option_parse_ia(
                                 /* Ignore the sub-option on non-critical errors. */
                                 continue;
 
-                        lt_min = MIN(lt_min, a->iaaddr.lifetime_valid);
+                        lt_min = MIN(lt_min, be32toh(a->iaaddr.lifetime_valid));
                         LIST_PREPEND(addresses, ia.addresses, a);
                         break;
                 }
@@ -651,7 +651,7 @@ int dhcp6_option_parse_ia(
                                 /* Ignore the sub-option on non-critical errors. */
                                 continue;
 
-                        lt_min = MIN(lt_min, a->iapdprefix.lifetime_valid);
+                        lt_min = MIN(lt_min, be32toh(a->iapdprefix.lifetime_valid));
                         LIST_PREPEND(addresses, ia.addresses, a);
                         break;
                 }