diff --git a/models/issue_dependency.go b/models/issue_dependency.go
index 709c34987..f6de7df65 100644
--- a/models/issue_dependency.go
+++ b/models/issue_dependency.go
@@ -122,16 +122,18 @@ func issueDepExists(e Engine, issueID int64, depID int64) (exists bool, err erro
 	return exists, nil
 }
 
-// IssueNoDependenciesLeft checks if issue can be closed
+// IssueDependencyIssue custom type for mysql join
 type IssueDependencyIssue struct {
 	IssueDependency `xorm:"extends"`
 	Issue `xorm:"extends"`
 }
 
+// TableName returns table name for mysql join
 func (IssueDependencyIssue) TableName() string {
 	return "issue_dependency"
 }
 
+// IssueNoDependenciesLeft checks if issue can be closed
 func IssueNoDependenciesLeft(issue *Issue) bool {
 
 	var issueDeps []IssueDependencyIssue