diff --git a/src/go/types/predicates.go b/src/go/types/predicates.go
index 73d240241e9..9aa565b68a6 100644
--- a/src/go/types/predicates.go
+++ b/src/go/types/predicates.go
@@ -302,9 +302,6 @@ func identical(x, y Type, cmpTags bool, p *ifacePair) bool {
 		// Two named types are identical if their type names originate
 		// in the same type declaration.
 		if y, ok := y.(*Named); ok {
-			x.expand(nil)
-			y.expand(nil)
-
 			xargs := x.TypeArgs().list()
 			yargs := y.TypeArgs().list()
 
diff --git a/src/go/types/unify.go b/src/go/types/unify.go
index ed769aafe87..6d10f71a901 100644
--- a/src/go/types/unify.go
+++ b/src/go/types/unify.go
@@ -425,9 +425,6 @@ func (u *unifier) nify(x, y Type, p *ifacePair) bool {
 
 	case *Named:
 		if y, ok := y.(*Named); ok {
-			x.expand(nil)
-			y.expand(nil)
-
 			xargs := x.targs.list()
 			yargs := y.targs.list()