diff --git a/src/ines.c b/src/ines.c
index a2165c0e..63ce4f7c 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -817,6 +817,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "820401/T-217",             436, Mapper436_Init         )
 	INES_BOARD( "NTDEC TH2348",             437, Mapper437_Init         )
 	INES_BOARD( "K-3071",                   438, Mapper438_Init         )
+	INES_BOARD( "YS2309",                   439, Mapper439_Init         )
 	INES_BOARD( "850335C",                  441, Mapper441_Init         )
 	INES_BOARD( "NC-3000M",                 443, Mapper443_Init         )
 	INES_BOARD( "NC-7000M/NC-8000M",        444, Mapper444_Init         )
diff --git a/src/ines.h b/src/ines.h
index 07a9ea2c..d6888276 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -325,6 +325,7 @@ void Mapper435_Init(CartInfo *);
 void Mapper436_Init(CartInfo *);
 void Mapper437_Init(CartInfo *);
 void Mapper438_Init(CartInfo *);
+void Mapper439_Init(CartInfo *);
 void Mapper441_Init(CartInfo *);
 void Mapper443_Init(CartInfo *);
 void Mapper444_Init(CartInfo *);
diff --git a/src/unif.c b/src/unif.c
index 3df7ebe2..c2e83903 100644
--- a/src/unif.c
+++ b/src/unif.c
@@ -621,6 +621,8 @@ static BMAPPING bmap[] = {
 	{ "BS-400R",                    422, Mapper422_Init,        0 },
 	{ "BS-4040R",                   422, Mapper422_Init,        0 },
 	{ "22026",                      271, Mapper271_Init,        0 },
+	{ "DS-07",                      439, Mapper439_Init,        0 },
+	{ "K86B",                       439, Mapper439_Init,        0 },
 	{ "COOLGIRL",                   342, COOLGIRL_Init,         BMCFLAG_256KCHRR },
 
 	{ NULL, NO_INES, NULL, 0 }