diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index e2b6b56..3f144e3 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7793,6 +7793,7 @@
         timeout = 0;
         break;
     case FUTEX_FD:
+        val = target_to_host_signal(val);
         timeout = 0;
         break;
     case FUTEX_CMP_REQUEUE: