diff --git a/src/go/types/type.go b/src/go/types/type.go
index f4cf61d8e67..4c681a79c4d 100644
--- a/src/go/types/type.go
+++ b/src/go/types/type.go
@@ -262,7 +262,7 @@ func NewInterface(methods []*Func, embeddeds []*Named) *Interface {
 	}
 	sort.Sort(byUniqueMethodName(methods))
 
-	if embeddeds == nil {
+	if embeddeds != nil {
 		sort.Sort(byUniqueTypeName(embeddeds))
 	}