diff --git a/go/internal/gcimporter/gcimporter.go b/go/internal/gcimporter/gcimporter.go
index 1e12965bbd..8dcd8bbb71 100644
--- a/go/internal/gcimporter/gcimporter.go
+++ b/go/internal/gcimporter/gcimporter.go
@@ -696,7 +696,7 @@ func (p *parser) parseInterfaceType(parent *types.Package) types.Type {
 
 	// Complete requires the type's embedded interfaces to be fully defined,
 	// but we do not define any
-	return types.NewInterfaceType(methods, nil).Complete()
+	return newInterface(methods, nil).Complete()
 }
 
 // ChanType = ( "chan" [ "<-" ] | "<-" "chan" ) Type .
diff --git a/go/ssa/builder.go b/go/ssa/builder.go
index 155c1e03bb..a13a884e4f 100644
--- a/go/ssa/builder.go
+++ b/go/ssa/builder.go
@@ -58,7 +58,7 @@ var (
 	tString     = types.Typ[types.String]
 	tUntypedNil = types.Typ[types.UntypedNil]
 	tRangeIter  = &opaqueType{nil, "iter"} // the type of all "range" iterators
-	tEface      = types.NewInterfaceType(nil, nil).Complete()
+	tEface      = types.NewInterface(nil, nil).Complete()
 
 	// SSA Value constants.
 	vZero = intConst(0)