diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 45d55fc50814ca196f9f3a6f628c26a5931209e1..ee4b52beb95ff5333e842c91295fad2728af78f5 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3657,7 +3657,7 @@ qemuBuildCommandLine(virConnectPtr conn,
 
         if (disk->driverName != NULL &&
             !STREQ(disk->driverName, "qemu")) {
-            qemuReportError(VIR_ERR_INTERNAL_ERROR,
+            qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                             _("unsupported driver name '%s' for disk '%s'"),
                             disk->driverName, disk->src);
             goto error;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index e2f428fbed67982f40431d7711599aacf321ad01..f4ee4c3f8f9e8bc907049a5264ed80d65d83bd39 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -5208,7 +5208,7 @@ qemuDomainAttachDeviceDiskLive(struct qemud_driver *driver,
     int ret = -1;
 
     if (disk->driverName != NULL && !STREQ(disk->driverName, "qemu")) {
-        qemuReportError(VIR_ERR_INTERNAL_ERROR,
+        qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                         _("unsupported driver name '%s' for disk '%s'"),
                         disk->driverName, disk->src);
         goto end;
diff --git a/tools/virsh.pod b/tools/virsh.pod
index 6529cd6920316265fb8d6d6f207c81b3a49881e5..88dee266070ccda4870b2312af01dd5bd79d4ce2 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -1184,7 +1184,8 @@ the single existing device; consider using B<update-device> for this usage.
 
 Attach a new disk device to the domain.
 I<source> and I<target> are paths for the files and devices.
-I<driver> can be I<file>, I<tap> or I<phy> depending on the kind of access.
+I<driver> can be I<file>, I<tap> or I<phy> for the Xen hypervisor depending on
+the kind of access; or I<qemu> for the QEMU emulator.
 I<type> can indicate I<cdrom> or I<floppy> as alternative to the disk default,
 although this use only replaces the media within the existing virtual cdrom or
 floppy device; consider using B<update-device> for this usage instead.