diff --git a/pkg/error/validation.go b/pkg/error/validation.go
index f8356c7..889744b 100644
--- a/pkg/error/validation.go
+++ b/pkg/error/validation.go
@@ -12,6 +12,7 @@ const (
 	UserSourceIDToShort = "userSourceID needs to be 25 characters long"
 
 	TagNameIsEmpty = "tagName cannot be empty"
+	TagTypeIsEmpty = "tagType cannot be empty"
 	TagListIsEmpty = "tagList cannot be empty"
 
 	TagAliasNameIsEmpty = "tagAliasName cannot be empty"