diff --git a/filesystem/vbmeta.go b/filesystem/vbmeta.go
index 91826b2..e5809d3 100644
--- a/filesystem/vbmeta.go
+++ b/filesystem/vbmeta.go
@@ -97,7 +97,7 @@
 	// Name of the chained partition
 	Name *string
 
-	// Rollback index location of the chained partition. Must be 0, 1, 2, etc. Default is the
+	// Rollback index location of the chained partition. Must be 1, 2, 3, etc. Default is the
 	// index of this partition in the list + 1.
 	Rollback_index_location *int64
 
@@ -225,8 +225,8 @@
 		}
 
 		ril := info.RollbackIndexLocation
-		if ril < 0 {
-			ctx.PropertyErrorf("chained_partitions", "rollback index location must be 0, 1, 2, ...")
+		if ril < 1 {
+			ctx.PropertyErrorf("chained_partitions", "rollback index location must be 1, 2, 3, ...")
 			continue
 		} else if seenRils[ril] {
 			ctx.PropertyErrorf("chained_partitions", "Multiple chained partitions with the same rollback index location %d", ril)
@@ -241,13 +241,13 @@
 	for _, cpm := range v.properties.Chained_partition_metadata {
 		name := proptools.String(cpm.Name)
 		if name == "" {
-			ctx.PropertyErrorf("chained_partitions", "name must be specified")
+			ctx.PropertyErrorf("chained_partition_metadata", "name must be specified")
 			continue
 		}
 
-		ril := proptools.IntDefault(cpm.Rollback_index_location, -1)
-		if ril < 0 {
-			ctx.PropertyErrorf("chained_partition_metadata", "rollback index location must be 0, 1, 2, ...")
+		ril := proptools.IntDefault(cpm.Rollback_index_location, 0)
+		if ril < 1 {
+			ctx.PropertyErrorf("chained_partition_metadata", "rollback index location must be 1, 2, 3, ...")
 			continue
 		} else if seenRils[ril] {
 			ctx.PropertyErrorf("chained_partition_metadata", "Multiple chained partitions with the same rollback index location %d", ril)