diff --git a/src/mess/drivers/msx.c b/src/mess/drivers/msx.c
index 1bead63423a..dad56ba803e 100644
--- a/src/mess/drivers/msx.c
+++ b/src/mess/drivers/msx.c
@@ -521,7 +521,6 @@ PCB Layouts missing
 #include "includes/msx.h"
 #include "bus/centronics/covox.h"
 #include "formats/dsk_dsk.h"
-#include "formats/dmk_dsk.h"
 #include "machine/msx_matsushita.h"
 #include "machine/msx_s1985.h"
 #include "machine/msx_systemflags.h"
@@ -1259,8 +1258,7 @@ static MACHINE_CONFIG_FRAGMENT( msx2_floplist )
 MACHINE_CONFIG_END
 
 FLOPPY_FORMATS_MEMBER( msx_state::floppy_formats )
-	FLOPPY_MSX_FORMAT,
-	FLOPPY_DMK_FORMAT
+	FLOPPY_MSX_FORMAT
 FLOPPY_FORMATS_END
 
 static SLOT_INTERFACE_START( msx_floppies )