diff --git a/src/conf/snapshot_conf.h b/src/conf/snapshot_conf.h
index b5b1ef2718..fbc9b17c54 100644
--- a/src/conf/snapshot_conf.h
+++ b/src/conf/snapshot_conf.h
@@ -63,7 +63,6 @@ typedef struct _virDomainSnapshotDiskDef virDomainSnapshotDiskDef;
 typedef virDomainSnapshotDiskDef *virDomainSnapshotDiskDefPtr;
 struct _virDomainSnapshotDiskDef {
     char *name;     /* name matching the <target dev='...' of the domain */
-    int idx;        /* index within snapshot->dom->disks that matches name */
     int snapshot;   /* virDomainSnapshotLocation */
 
     /* details of wrapper external file. src is always non-NULL.