diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index b10a40e545c8be96109681c2c6b46e57beba1293..eae1dc01dc0314b7cf4571393228d87e8f2ddae4 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -2042,6 +2042,10 @@ virStorageSourceCopy(const virStorageSource *src,
     ret->detected = src->detected;
     ret->debugLevel = src->debugLevel;
     ret->debug = src->debug;
+    ret->iomode = src->iomode;
+    ret->cachemode = src->cachemode;
+    ret->discard = src->discard;
+    ret->detect_zeroes = src->detect_zeroes;
 
     /* storage driver metadata are not copied */
     ret->drv = NULL;
diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h
index 0909fe212c521547ec22cc549643997f79f38f48..03e9ba9d2dd8f63ceef66cb9b551181ea5f42eb1 100644
--- a/src/util/virstoragefile.h
+++ b/src/util/virstoragefile.h
@@ -305,6 +305,14 @@ struct _virStorageSource {
 
     unsigned int debugLevel;
     bool debug;
+
+    /* Libvirt currently stores the following properities in virDomainDiskDef.
+     * These instances are currently just copies from the parent definition and
+     * are not mapped back to the XML */
+    int iomode; /* enum virDomainDiskIo */
+    int cachemode; /* enum virDomainDiskCache */
+    int discard; /* enum virDomainDiskDiscard */
+    int detect_zeroes; /* enum virDomainDiskDetectZeroes */
 };