diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 674f70e..05f0391 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -12012,7 +12012,7 @@
 #endif
 #if defined(TARGET_NR_epoll_create1) && defined(CONFIG_EPOLL_CREATE1)
     case TARGET_NR_epoll_create1:
-        return get_errno(epoll_create1(arg1));
+        return get_errno(epoll_create1(target_to_host_bitmask(arg1, fcntl_flags_tbl)));
 #endif
 #if defined(TARGET_NR_epoll_ctl)
     case TARGET_NR_epoll_ctl: