diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 5db72ef634..8361d3d9c1 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2063,6 +2063,12 @@ qemuDomainAttachChrDevice(virQEMUDriver *driver,
     bool need_release = false;
     bool guestfwd = false;
 
+    if (qemuChrIsPlatformDevice(vmdef, chr)) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                       _("Cannot hotplug platform device"));
+        return -1;
+    }
+
     if (chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL) {
         guestfwd = chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_GUESTFWD;
 
@@ -6051,6 +6057,12 @@ qemuDomainDetachDeviceChr(virQEMUDriver *driver,
         goto cleanup;
     }
 
+    if (qemuChrIsPlatformDevice(vmdef, tmpChr)) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                       _("Cannot detach platform device"));
+        return -1;
+    }
+
     if (vmdef->os.type == VIR_DOMAIN_OSTYPE_HVM &&
         tmpChr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE &&
         (tmpChr->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL ||