diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index 1c151021c7..c5e0fda5e5 100644
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -867,7 +867,7 @@ static int method_create_session(sd_bus_message *message, void *userdata, sd_bus
                 do {
                         id = mfree(id);
 
-                        if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
+                        if (asprintf(&id, "c%" PRIu64, ++m->session_counter) < 0)
                                 return -ENOMEM;
 
                 } while (hashmap_contains(m->sessions, id));
@@ -3274,7 +3274,7 @@ static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error
         do {
                 id = mfree(id);
 
-                if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
+                if (asprintf(&id, "%" PRIu64, ++m->inhibit_counter) < 0)
                         return -ENOMEM;
 
         } while (hashmap_get(m->inhibitors, id));
diff --git a/src/login/logind.h b/src/login/logind.h
index d0b1f9671e..e6a04e0834 100644
--- a/src/login/logind.h
+++ b/src/login/logind.h
@@ -59,8 +59,8 @@ struct Manager {
         char **kill_only_users, **kill_exclude_users;
         bool kill_user_processes;
 
-        unsigned long session_counter;
-        unsigned long inhibit_counter;
+        uint64_t session_counter;
+        uint64_t inhibit_counter;
 
         Hashmap *session_units;
         Hashmap *user_units;