diff --git a/models/issue.go b/models/issue.go
index 3bd45396dcf2..d10c521db6d8 100644
--- a/models/issue.go
+++ b/models/issue.go
@@ -248,7 +248,7 @@ func (issue *Issue) GetIsRead(userID int64) error {
 
 // APIURL returns the absolute APIURL to this issue.
 func (issue *Issue) APIURL() string {
-	return issue.Repo.APIURL() + "/" + path.Join("issues", fmt.Sprint(issue.ID))
+	return issue.Repo.APIURL() + "/" + path.Join("issues", fmt.Sprint(issue.Index))
 }
 
 // HTMLURL returns the absolute URL to this issue.