diff --git a/doc/compatibility/board.rst b/doc/compatibility/board.rst
index 52f73b9..09c4ca0 100644
--- a/doc/compatibility/board.rst
+++ b/doc/compatibility/board.rst
@@ -64,6 +64,8 @@ Boards
                tangnano `Sipeed Tang Nano <https://tangnano.sipeed.com/en/>`__                                                                                            littleBee GW1N-1              OK
              tangnano4k `Sipeed Tang Nano 4K <https://tangnano.sipeed.com/en/>`__                                                                                         littleBee GW1NSR-4C           OK        IF/EF
                 tec0117 `Trenz Gowin LittleBee (TEC0117) <https://shop.trenz-electronic.de/en/TEC0117-01-FPGA-Module-with-GOWIN-LittleBee-and-8-MByte-internal-SDRAM>`__  littleBee GW1NR-9             OK        IF
+                  ulx3s `Radiona ULX3S <https://radiona.org/ulx3s/>`__                                                                                                    ECP5 LFE5U                    OK        OK
+              ulx3s_dfu `Radiona ULX3S DFU mode <https://github.com/emard/had2019-playground>`__                                                                          ECP5 LFE5U                    NA        OK
                    xtrx `FairWaves XTRXPro <https://www.crowdsupply.com/fairwaves/xtrx>`__                                                                                Artix xc7a50tcpg236           OK        OK
              xyloni_spi `Efinix Xyloni <https://www.efinixinc.com/products-devkits-xyloni.html>`__                                                                        Trion T8F81                   NA        AS
   trion_t120_bga576_spi `Efinix Trion T120 BGA576 Dev Kit <https://www.efinixinc.com/products-devkits-triont120bga576.html>`__                                            Trion T120BGA576              NA        AS
diff --git a/src/board.hpp b/src/board.hpp
index 8ed0d5c..6750ec0 100644
--- a/src/board.hpp
+++ b/src/board.hpp
@@ -162,6 +162,7 @@ static std::map <std::string, target_board_t> board_list = {
 			FT232RL_RI, FT232RL_DSR, FT232RL_CTS, FT232RL_DCD, CABLE_DEFAULT),
 	JTAG_BITBANG_BOARD("ulx3s",   "", "ft231X",  0, 0,
 			FT232RL_DCD, FT232RL_DSR, FT232RL_RI, FT232RL_CTS, CABLE_DEFAULT),
+	DFU_BOARD("ulx3s_dfu",        "", "dfu", 0x1d50, 0x614b, 0),
 	JTAG_BOARD("ecpix5",          "", "ecpix5-debug", 0, 0, CABLE_DEFAULT),
 	JTAG_BOARD("xtrx",            "xc7a50tcpg236", ""            , 0, 0, CABLE_DEFAULT),
 	JTAG_BOARD("xyloni_jtag",     "", "efinix_jtag_ft4232"       , 0, 0, CABLE_DEFAULT),