diff --git a/src/device/cassette.c b/src/device/cassette.c
index ac79edff2..5cde2fbd0 100644
--- a/src/device/cassette.c
+++ b/src/device/cassette.c
@@ -715,7 +715,7 @@ cassette_init(UNUSED(const device_t *info))
 const device_t cassette_device = {
     .name          = "IBM PC/PCjr Cassette Device",
     .internal_name = "cassette",
-    .flags         = 0,
+    .flags         = DEVICE_CASETTE,
     .local         = 0,
     .init          = cassette_init,
     .close         = cassette_close,
diff --git a/src/include/86box/device.h b/src/include/86box/device.h
index 1c3ef1ef3..4cc283a25 100644
--- a/src/include/86box/device.h
+++ b/src/include/86box/device.h
@@ -79,6 +79,7 @@
 // #define CONFIG_STANDALONE 257      /* not available on the on-board variant */
 
 enum {
+    DEVICE_CASETTE   = 1,          /* requires a Casette Port */
     DEVICE_SIDECAR   = 2,          /* requires an IBM PCjr */
     DEVICE_ISA       = 4,          /* requires the ISA bus */
     DEVICE_XT_KBC    = 8,          /* requires an XT-compatible keyboard controller */
diff --git a/src/include/86box/machine.h b/src/include/86box/machine.h
index 52af90581..b2e4c01f2 100644
--- a/src/include/86box/machine.h
+++ b/src/include/86box/machine.h
@@ -67,7 +67,7 @@
 #define MACHINE_AGP         (MACHINE_BUS_AGP | MACHINE_PCI)       /* sys is AT-compatible with AGP  */
 #define MACHINE_AGP98       (MACHINE_BUS_AGP | MACHINE_PCI98)     /* sys is NEC PC-98x1 series with AGP (did that even exist?) */
 
-#define MACHINE_PC5150      (MACHINE_PC | MACHINE_CASSETTE)          /* sys is IBM PC 5150 */
+#define MACHINE_PC5150      (MACHINE_CASSETTE | MACHINE_PC)          /* sys is IBM PC 5150 */
 #define MACHINE_PCJR        (MACHINE_CASSETTE | MACHINE_BUS_SIDECAR) /* sys is PCjr */
 #define MACHINE_PS2         (MACHINE_AT | MACHINE_BUS_PS2)           /* sys is PS/2 */
 #define MACHINE_PS2_MCA     (MACHINE_MCA | MACHINE_BUS_PS2)          /* sys is MCA PS/2 */