4 files changed, 6 insertions, 6 deletions
diff --git a/bug/operations/add_comment.go b/bug/operations/add_comment.go
index 7ae6f2dd..b4126a8e 100644
--- a/bug/operations/add_comment.go
+++ b/bug/operations/add_comment.go
@@ -42,11 +42,11 @@ func NewAddCommentOp(author bug.Person, message string, files []util.Hash) AddCo
 }
 
 // Convenience function to apply the operation
-func Comment(b *bug.Bug, author bug.Person, message string) {
+func Comment(b bug.Interface, author bug.Person, message string) {
 	CommentWithFiles(b, author, message, nil)
 }
 
-func CommentWithFiles(b *bug.Bug, author bug.Person, message string, files []util.Hash) {
+func CommentWithFiles(b bug.Interface, author bug.Person, message string, files []util.Hash) {
 	addCommentOp := NewAddCommentOp(author, message, files)
 	b.Append(addCommentOp)
 }
diff --git a/bug/operations/label_change.go b/bug/operations/label_change.go
index 8f608dbc..5d343e5b 100644
--- a/bug/operations/label_change.go
+++ b/bug/operations/label_change.go
@@ -60,7 +60,7 @@ func NewLabelChangeOperation(author bug.Person, added, removed []bug.Label) Labe
 }
 
 // ChangeLabels is a convenience function to apply the operation
-func ChangeLabels(out io.Writer, b *bug.Bug, author bug.Person, add, remove []string) error {
+func ChangeLabels(out io.Writer, b bug.Interface, author bug.Person, add, remove []string) error {
 	var added, removed []bug.Label
 
 	if out == nil {
diff --git a/bug/operations/set_status.go b/bug/operations/set_status.go
index ed6c328c..bafcf5ee 100644
--- a/bug/operations/set_status.go
+++ b/bug/operations/set_status.go
@@ -27,13 +27,13 @@ func NewSetStatusOp(author bug.Person, status bug.Status) SetStatusOperation {
 }
 
 // Convenience function to apply the operation
-func Open(b *bug.Bug, author bug.Person) {
+func Open(b bug.Interface, author bug.Person) {
 	op := NewSetStatusOp(author, bug.OpenStatus)
 	b.Append(op)
 }
 
 // Convenience function to apply the operation
-func Close(b *bug.Bug, author bug.Person) {
+func Close(b bug.Interface, author bug.Person) {
 	op := NewSetStatusOp(author, bug.ClosedStatus)
 	b.Append(op)
 }
diff --git a/bug/operations/set_title.go b/bug/operations/set_title.go
index 49a270f7..5bd6260a 100644
--- a/bug/operations/set_title.go
+++ b/bug/operations/set_title.go
@@ -29,7 +29,7 @@ func NewSetTitleOp(author bug.Person, title string, was string) SetTitleOperatio
 }
 
 // Convenience function to apply the operation
-func SetTitle(b *bug.Bug, author bug.Person, title string) {
+func SetTitle(b bug.Interface, author bug.Person, title string) {
 	it := bug.NewOperationIterator(b)
 
 	var lastTitleOp bug.Operation