diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index f0ca9d59a3a953ae3ef2b3668bfeade40008c9d6..81e8087df7d78fe408298c82a8fb9ae659b49def 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -13708,7 +13708,7 @@ virDomainDiskDefFormat(virBufferPtr buf,
     const char *iomode = virDomainDiskIoTypeToString(def->iomode);
     const char *ioeventfd = virDomainIoEventFdTypeToString(def->ioeventfd);
     const char *event_idx = virDomainVirtioEventIdxTypeToString(def->event_idx);
-    const char *copy_on_read = virDomainVirtioEventIdxTypeToString(def->copy_on_read);
+    const char *copy_on_read = virDomainDiskCopyOnReadTypeToString(def->copy_on_read);
     const char *sgio = virDomainDiskSGIOTypeToString(def->sgio);
     const char *discard = virDomainDiskDiscardTypeToString(def->discard);
 
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-copy_on_read.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-copy_on_read.xml
index 0834cf20cb74b7051e58e59b297ee2656a4fd045..076095e276ff808d92aea1df7c63c1f0a11e1ab7 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-disk-copy_on_read.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-copy_on_read.xml
@@ -1,6 +1,8 @@
 <domain type='qemu'>
   <name>test</name>
+  <uuid>468404ad-d49c-40f2-9e14-02294f9c1be3</uuid>
   <memory unit='KiB'>1048576</memory>
+  <currentMemory unit='KiB'>1048576</currentMemory>
   <vcpu placement='static'>1</vcpu>
   <os>
     <type arch='x86_64' machine='pc-0.13'>hvm</type>
@@ -20,27 +22,30 @@
       <target dev='vda' bus='virtio'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
     </disk>
-      <disk type='file' device='cdrom'>
+    <disk type='file' device='cdrom'>
       <driver name='qemu' type='raw'/>
       <source file='/var/lib/libvirt/Fedora-14-x86_64-Live-KDE.iso'/>
       <target dev='hdc' bus='ide'/>
       <readonly/>
       <address type='drive' controller='0' bus='1' target='0' unit='0'/>
     </disk>
+    <controller type='usb' index='0'/>
+    <controller type='virtio-serial' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
+    </controller>
+    <controller type='ide' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
     <interface type='user'>
       <mac address='52:54:00:e5:48:58'/>
       <model type='virtio'/>
       <driver name='vhost' txmode='iothread'/>
     </interface>
-    <controller type='usb' index='0'/>
-    <controller type='virtio-serial' index='0'>
-      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
-    </controller>
     <serial type='pty'>
       <target port='0'/>
     </serial>
     <console type='pty'>
       <target type='serial' port='0'/>
     </console>
+    <memballoon model='virtio'/>
   </devices>
 </domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 148a05aab0e73bbe941640abd17e75102ef7019c..807b623417adf7f96cb3cab0705cbc95254b7c0a 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -293,6 +293,8 @@ mymain(void)
     DO_TEST("hostdev-scsi-virtio-scsi");
     DO_TEST("hostdev-scsi-readonly");
 
+    DO_TEST("disk-copy_on_read");
+
     virObjectUnref(driver.caps);
     virObjectUnref(driver.xmlopt);