diff --git a/modules/structs/commit_status.go b/modules/structs/commit_status.go
index fee0da214c..8880f5a085 100644
--- a/modules/structs/commit_status.go
+++ b/modules/structs/commit_status.go
@@ -38,7 +38,7 @@ func (css CommitStatusState) String() string {
 // NoBetterThan returns true if this State is no better than the given State
 // This function only handles the states defined in CommitStatusPriorities
 func (css CommitStatusState) NoBetterThan(css2 CommitStatusState) bool {
-	// NoBetterThan only handles the 6 states above
+	// only handle the states with defined priorities above, it always returns false for undefined priorities
 	if _, exist := commitStatusPriorities[css]; !exist {
 		return false
 	}