diff --git a/src/network/networkd-routing-policy-rule.c b/src/network/networkd-routing-policy-rule.c
index 857b01468fa..8386d214b8b 100644
--- a/src/network/networkd-routing-policy-rule.c
+++ b/src/network/networkd-routing-policy-rule.c
@@ -3,6 +3,7 @@
 #include <net/if.h>
 #include <linux/fib_rules.h>
 
+#include "af-list.h"
 #include "alloc-util.h"
 #include "conf-parser.h"
 #include "fileio.h"
@@ -989,6 +990,7 @@ int routing_policy_serialize_rules(Set *rules, FILE *f) {
         SET_FOREACH(rule, rules, i) {
                 _cleanup_free_ char *from_str = NULL, *to_str = NULL;
                 bool space = false;
+                const char *family_str;
 
                 fputs("RULE=", f);
 
@@ -1013,6 +1015,12 @@ int routing_policy_serialize_rules(Set *rules, FILE *f) {
                         space = true;
                 }
 
+                family_str = af_to_name(rule->family);
+                if (family_str)
+                fprintf(f, "%sfamily=%s",
+                        space ? " " : "",
+                        family_str);
+
                 if (rule->tos != 0) {
                         fprintf(f, "%stos=%hhu",
                                 space ? " " : "",
@@ -1135,6 +1143,13 @@ int routing_policy_load_rules(const char *state_file, Set **rules) {
                                         continue;
                                 }
 
+                        } else if (streq(a, "family")) {
+                                r = af_from_name(b);
+                                if (r < 0) {
+                                        log_error_errno(r, "Failed to parse RPDB rule family, ignoring: %s", b);
+                                        continue;
+                                }
+                                rule->family = r;
                         } else if (streq(a, "tos")) {
                                 r = safe_atou8(b, &rule->tos);
                                 if (r < 0) {
diff --git a/src/network/test-routing-policy-rule.c b/src/network/test-routing-policy-rule.c
index 57bfb6af680..0319b6db096 100644
--- a/src/network/test-routing-policy-rule.c
+++ b/src/network/test-routing-policy-rule.c
@@ -62,31 +62,31 @@ int main(int argc, char **argv) {
         test_setup_logging(LOG_DEBUG);
 
         test_rule_serialization("basic parsing",
-                                "RULE=from=1.2.3.4/32 to=2.3.4.5/32 tos=5 fwmark=1/2 table=10", NULL);
+                                "RULE=from=1.2.3.4/32 to=2.3.4.5/32 family=AF_INET tos=5 fwmark=1/2 table=10", NULL);
 
         test_rule_serialization("ignored values",
                                 "RULE=something=to=ignore from=1.2.3.4/32 from=1.2.3.4/32"
                                 "   \t  to=2.3.4.5/24 to=2.3.4.5/32 tos=5 fwmark=2 fwmark=1 table=10 table=20",
                                 "RULE=from=1.2.3.4/32"
-                                " to=2.3.4.5/32 tos=5 fwmark=1/0 table=20");
+                                " to=2.3.4.5/32 family=AF_INET tos=5 fwmark=1/0 table=20");
 
         test_rule_serialization("ipv6",
-                                "RULE=from=1::2/64 to=2::3/64 table=6", NULL);
+                                "RULE=from=1::2/64 to=2::3/64 family=AF_INET6 table=6", NULL);
 
-        assert_se(asprintf(&p, "RULE=from=1::2/64 to=2::3/64 table=%d", RT_TABLE_MAIN) >= 0);
+        assert_se(asprintf(&p, "RULE=from=1::2/64 to=2::3/64 family=AF_INET6 table=%d", RT_TABLE_MAIN) >= 0);
         test_rule_serialization("default table",
                                 "RULE=from=1::2/64 to=2::3/64", p);
 
         test_rule_serialization("incoming interface",
                                 "RULE=from=1::2/64 to=2::3/64 table=1 iif=lo",
-                                "RULE=from=1::2/64 to=2::3/64 iif=lo table=1");
+                                "RULE=from=1::2/64 to=2::3/64 family=AF_INET6 iif=lo table=1");
 
         test_rule_serialization("outgoing interface",
-                                "RULE=from=1::2/64 to=2::3/64 oif=eth0 table=1", NULL);
+                                "RULE=from=1::2/64 to=2::3/64 family=AF_INET6 oif=eth0 table=1", NULL);
 
         test_rule_serialization("freeing interface names",
-                                "RULE=from=1::2/64 to=2::3/64 iif=e0 iif=e1 oif=e0 oif=e1 table=1",
-                                "RULE=from=1::2/64 to=2::3/64 iif=e1 oif=e1 table=1");
+                                "RULE=from=1::2/64 to=2::3/64 family=AF_INET6 iif=e0 iif=e1 oif=e0 oif=e1 table=1",
+                                "RULE=from=1::2/64 to=2::3/64 family=AF_INET6 iif=e1 oif=e1 table=1");
 
         return 0;
 }