diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 6d6bbf246729714415611ab7443efbf8228991cf..0c85a58ebbf37b5b11f45afeedb083ecc77377f2 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -5544,8 +5544,7 @@ virQEMUCapsFillDomainDeviceDiskCaps(virQEMUCapsPtr qemuCaps,
                              VIR_DOMAIN_DISK_DEVICE_LUN);
 
     /* PowerPC pseries based VMs do not support floppy device */
-    if (!ARCH_IS_PPC64(qemuCaps->arch) ||
-        (STRNEQ(machine, "pseries") && !STRPREFIX(machine, "pseries-")))
+    if (!qemuDomainMachineIsPSeries(machine, qemuCaps->arch))
         VIR_DOMAIN_CAPS_ENUM_SET(disk->diskDevice, VIR_DOMAIN_DISK_DEVICE_FLOPPY);
 
     VIR_DOMAIN_CAPS_ENUM_SET(disk->bus,
@@ -5555,8 +5554,7 @@ virQEMUCapsFillDomainDeviceDiskCaps(virQEMUCapsPtr qemuCaps,
                              /* VIR_DOMAIN_DISK_BUS_SD */);
 
     /* PowerPC pseries based VMs do not support floppy device */
-    if (!ARCH_IS_PPC64(qemuCaps->arch) ||
-        (STRNEQ(machine, "pseries") && !STRPREFIX(machine, "pseries-")))
+    if (!qemuDomainMachineIsPSeries(machine, qemuCaps->arch))
         VIR_DOMAIN_CAPS_ENUM_SET(disk->bus, VIR_DOMAIN_DISK_BUS_FDC);
 
     if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_USB_STORAGE))