diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 085ce53021..954ed14df4 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -5747,7 +5747,7 @@ static abi_long do_ioctl(int fd, int cmd, abi_long arg)
         if (ie->target_cmd == 0) {
             qemu_log_mask(
                 LOG_UNIMP, "Unsupported ioctl: cmd=0x%04lx\n", (long)cmd);
-            return -TARGET_ENOSYS;
+            return -TARGET_ENOTTY;
         }
         if (ie->target_cmd == cmd)
             break;
@@ -5759,7 +5759,7 @@ static abi_long do_ioctl(int fd, int cmd, abi_long arg)
     } else if (!ie->host_cmd) {
         /* Some architectures define BSD ioctls in their headers
            that are not implemented in Linux.  */
-        return -TARGET_ENOSYS;
+        return -TARGET_ENOTTY;
     }
 
     switch(arg_type[0]) {
@@ -5817,7 +5817,7 @@ static abi_long do_ioctl(int fd, int cmd, abi_long arg)
         qemu_log_mask(LOG_UNIMP,
                       "Unsupported ioctl type: cmd=0x%04lx type=%d\n",
                       (long)cmd, arg_type[0]);
-        ret = -TARGET_ENOSYS;
+        ret = -TARGET_ENOTTY;
         break;
     }
     return ret;