diff --git a/src/sysusers/sysusers.c b/src/sysusers/sysusers.c
index dfb703f10e..9c1abf984e 100644
--- a/src/sysusers/sysusers.c
+++ b/src/sysusers/sysusers.c
@@ -507,7 +507,7 @@ static int write_temporary_passwd(const char *passwd_path, FILE **tmpfile, char
                         break;
         }
 
-        r = fflush_and_check(passwd);
+        r = fflush_sync_and_check(passwd);
         if (r < 0)
                 return log_debug_errno(r, "Failed to flush %s: %m", passwd_tmp);