diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index 94a77ce862..b43acf67f1 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -113,7 +113,7 @@ enum {
     BACKING_STORE_ERROR,
 };
 
-#define FILE_TYPE_VERSIONS_LAST 2
+#define FILE_TYPE_VERSIONS_LAST 3
 
 struct FileEncryptionInfo {
     int format; /* Encryption format to assign */
@@ -374,7 +374,7 @@ static struct FileTypeInfo const fileTypeInfo[] = {
     },
     [VIR_STORAGE_FILE_VMDK] = {
         0, "KDMV", NULL,
-        LV_LITTLE_ENDIAN, 4, 4, {1, 2},
+        LV_LITTLE_ENDIAN, 4, 4, {1, 2, 3},
         4+4+4, 8, 512, NULL, vmdk4GetBackingStore, NULL
     },
 };