Im trying to install drivers for a rosewill RNX-N600UBE wireless card (Ralink RT2870 chipset) on Kali Linux. I downloaded the drivers form their website and unpacked/unzipped them, but now when i try to run the 'make' command i get this error.

/home/fox/System/2011_0427_RT3572_Linux_STA_v2.5.0.0.DPO/os/linux/../../os/linux/rt_linux.c:1156:20: error: incompatible types when assigning to type ‘int’ from type ‘kuid_t’
/home/fox/System/2011_0427_RT3572_Linux_STA_v2.5.0.0.DPO/os/linux/../../os/linux/rt_linux.c:1157:20: error: incompatible types when assigning to type ‘int’ from type ‘kgid_t’
make[4]: *** [/home/fox/System/2011_0427_RT3572_Linux_STA_v2.5.0.0.DPO/os/linux/../../os/linux/rt_linux.o] Error 1
make[3]: *** [_module_/home/fox/System/2011_0427_RT3572_Linux_STA_v2.5.0.0.DPO/os/linux] Error 2
make[2]: *** [sub-make] Error 2
make[1]: *** [all] Error 2
  • I think you might need a different version of something, maybe the compiler? Commented Apr 16, 2014 at 13:43
  • As a side-note, why would someone new to Linux fiddle with Kali? Thats a distro for security tests and attacks, packed with low level tools. Surely not meant for an unexperienced linux user
    – MestreLion
    Commented Oct 19, 2018 at 5:05

4 Answers 4


The issue is that one of the kernel headers / interfaces changed in a recent 3.x kernel. Where a UID / GID values were originally referred to as regular integers, they are now structs with a single element. Any code relying on the older definition now will fail to compile until updated to match the new kernel headers.

I'm currently experimenting with patching a similar error in virtualbox-guest-utils for my Ubuntu install; in theory locating and replacing instances of ->i_uid = with ->i_uid.val = or ->i_gid = with ->i_gid.val = on the line numbers reported in the error should fix the problem (but I can't guarantee that at this time as compilation is now failing on a different, unrelated, error for me).

Your best bet is contacting the original author of your code for an updated version of the source that works with the newer kernels.

  • 7
    Tested! This DOES work! I changed current_fsuid() to current_fsuid().val
    – Jonathan
    Commented Apr 27, 2015 at 0:09
  • 1
    For me, I also had to change current_fsgid() to current_fsgid().val Commented Oct 14, 2015 at 11:22
  • @JonathanLeaders touché Thanks. However, the patch converting int to kuid_t also seems to do the trick. Commented Oct 16, 2015 at 16:00

I found a fix to the compilation errors in another driver on this website: http://www.arnelborja.com/compiling-rt2870-wifi-driver-in-fedora/

below is the patch content:

--- include/os/rt_linux.h   2013-09-12 13:27:14.000000000 +0800
+++ include/os/rt_linux.h.patched   2014-03-23 11:45:03.907628847 +0800
@@ -279,8 +279,8 @@ typedef struct file* RTMP_OS_FD;

 typedef struct _OS_FS_INFO_
-   int             fsuid;
-   int             fsgid;
+   kuid_t              fsuid;
+   kgid_t              fsgid;
    mm_segment_t    fs;
  • 1
    This is a good, working solution for the MT7601U driver, used for the Mediatek/Ralink 148F:7601 chipset, as well. (Yes, I'm just adding these keywords for SEO reasons.)
    – billyjmc
    Commented Mar 30, 2015 at 3:29
  • for my kernel 4.13.16-302.fc27.x86_64 on Fedora 27, this don't work anymore. Fails with compiling error.
    – kmonsoor
    Commented Dec 9, 2017 at 12:27
  • @billyjmc: just note that, as-is, this solution does not work for kernels < 3.5, where kuid_t and kgid_t were introduced. For those, k must be dropped, as in uid_t fsuid; and gid_t fsgid;
    – MestreLion
    Commented Oct 19, 2018 at 5:10
  • Confirmed works on Centos 7.11 (3.10.0-1127.8.2.el7.x86_64)
    – Ron
    Commented May 29, 2020 at 17:04

make only reports the errors but they are in fact errors from your compiler (probably gcc):

error: incompatible types when assigning to type ‘int’ from type ‘kuid_t’ 

Basically, your code is buggy or inappropriate for your platform but make functions correctly.


This solution worked for me. The procedure I followed was:

  1. I followed the steps for my distribution (Debian Jessie) from here.

  2. I saved de driver for Linux of the manufacturer (which comes with the equipment in the CDROM), and I unzipped it to a folder.

  3. In the folder, I typed make (as root), and I got an error. So, I did the modification above, and it worked.

  4. I typed make install (as root), I rebooted the computer, and the wireless interface was recognized. I configured it and it worked. ;)

My system is: Debian Jessie, kernel 3.16.0-4-amd64, using gnome.

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