diff --git a/hw/mips_jazz.c b/hw/mips_jazz.c
index db927f1..c6a1ace 100644
--- a/hw/mips_jazz.c
+++ b/hw/mips_jazz.c
@@ -326,6 +326,7 @@ static QEMUMachine mips_magnum_machine = {
     .desc = "MIPS Magnum",
     .init = mips_magnum_init,
     .use_scsi = 1,
+    .no_sdcard = 1,
 };
 
 static QEMUMachine mips_pica61_machine = {
@@ -333,6 +334,7 @@ static QEMUMachine mips_pica61_machine = {
     .desc = "Acer Pica 61",
     .init = mips_pica61_init,
     .use_scsi = 1,
+    .no_sdcard = 1,
 };
 
 static void mips_jazz_machine_init(void)