diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 5675c7d787..c6e73dbab0 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -1350,7 +1350,7 @@ int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event, int64_t
         else {
                 r = sd_event_default(&client->event);
                 if (r < 0)
-                        return 0;
+                        return r;
         }
 
         client->event_priority = priority;
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index e2415a5b47..b78d1c29ec 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -1507,7 +1507,7 @@ int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64
         else {
                 r = sd_event_default(&client->event);
                 if (r < 0)
-                        return 0;
+                        return r;
         }
 
         client->event_priority = priority;
diff --git a/src/libsystemd-network/sd-ndisc.c b/src/libsystemd-network/sd-ndisc.c
index b6a55a5095..51e12d4528 100644
--- a/src/libsystemd-network/sd-ndisc.c
+++ b/src/libsystemd-network/sd-ndisc.c
@@ -137,7 +137,7 @@ int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int64_t priority) {
         else {
                 r = sd_event_default(&nd->event);
                 if (r < 0)
-                        return 0;
+                        return r;
         }
 
         nd->event_priority = priority;
diff --git a/src/libsystemd-network/sd-radv.c b/src/libsystemd-network/sd-radv.c
index 948f7bc382..df5fcc6c02 100644
--- a/src/libsystemd-network/sd-radv.c
+++ b/src/libsystemd-network/sd-radv.c
@@ -58,7 +58,7 @@ int sd_radv_attach_event(sd_radv *ra, sd_event *event, int64_t priority) {
         else {
                 r = sd_event_default(&ra->event);
                 if (r < 0)
-                        return 0;
+                        return r;
         }
 
         ra->event_priority = priority;