diff --git a/edict.go b/edict.go
index c54fc53..c2f565b 100644
--- a/edict.go
+++ b/edict.go
@@ -34,7 +34,7 @@ const jmdictRevision = "jmdict4"
 func jmdictBuildRules(term *dbTerm) {
 	for _, tag := range term.DefinitionTags {
 		switch tag {
-		case "adj-i", "v1", "vk":
+		case "adj-i", "v1", "vk", "vz":
 			term.addRules(tag)
 		default:
 			if strings.HasPrefix(tag, "v5") {
diff --git a/rikai.go b/rikai.go
index 373c053..9c3af74 100644
--- a/rikai.go
+++ b/rikai.go
@@ -41,7 +41,7 @@ type rikaiEntry struct {
 func rikaiBuildRules(term *dbTerm) {
 	for _, tag := range term.DefinitionTags {
 		switch tag {
-		case "adj-i", "v1", "vk":
+		case "adj-i", "v1", "vk", "vz":
 			term.addRules(tag)
 		default:
 			if strings.HasPrefix(tag, "v5") {