diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index ca6e0b8fb0..eff107b8bc 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6444,7 +6444,7 @@ static abi_long do_prctl(CPUArchState *env, abi_long option, abi_long arg2,
             int deathsig;
             ret = get_errno(prctl(PR_GET_PDEATHSIG, &deathsig,
                                   arg3, arg4, arg5));
-            if (!is_error(ret) && arg2 && put_user_s32(deathsig, arg2)) {
+            if (!is_error(ret) && put_user_s32(deathsig, arg2)) {
                 return -TARGET_EFAULT;
             }
             return ret;