Unable to install iscsitarget

DKMS make.log for iscsitarget-1.4.20.3+svn502 for kernel 4.9.0-0.bpo.3-amd64 (x86_64)
Wed Jul 19 13:37:32 MSK 2017
make: Entering directory '/usr/src/linux-headers-4.9.0-0.bpo.3-amd64'
  LD      /var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/built-in.o
  LD      /var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/kernel/built-in.o
  CC [M]  /var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/kernel/tio.o
In file included from /var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/kernel/tio.c:7:0:
/var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/kernel/iscsi.h:274:19: error: field 
'rx_hash' has i$
  struct hash_desc rx_hash;
                   ^
/var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/kernel/iscsi.h:275:19: error: field 
'tx_hash' has i$
  struct hash_desc tx_hash;
                   ^
/usr/src/linux-headers-4.9.0-0.bpo.3-common/scripts/Makefile.build:298: recipe for target 
'/var/lib$
make[4]: *** [/var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/kernel/tio.o] Error 1
/usr/src/linux-headers-4.9.0-0.bpo.3-common/scripts/Makefile.build:549: recipe for target 
'/var/lib$
make[3]: *** [/var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/kernel] Error 2
/usr/src/linux-headers-4.9.0-0.bpo.3-common/Makefile:1507: recipe for target 
'_module_/var/lib/dkms$
make[2]: *** [_module_/var/lib/dkms/iscsitarget/1.4.20.3+svn502/build] Error 2
Makefile:150: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
Makefile:8: recipe for target 'all' failed
make: *** [all] Error 2
make: Leaving directory '/usr/src/linux-headers-4.9.0-0.bpo.3-amd64