diff --git a/src/cmd/compile/internal/noder/noder.go b/src/cmd/compile/internal/noder/noder.go
index 4c7c9fc322..06c3b00601 100644
--- a/src/cmd/compile/internal/noder/noder.go
+++ b/src/cmd/compile/internal/noder/noder.go
@@ -625,6 +625,9 @@ func (p *noder) params(params []*syntax.Field, dddOk bool) []*ir.Field {
 	for i, param := range params {
 		p.setlineno(param)
 		nodes = append(nodes, p.param(param, dddOk, i+1 == len(params)))
+		if i > 0 && params[i].Type == params[i-1].Type {
+			nodes[i].Ntype = nodes[i-1].Ntype
+		}
 	}
 	return nodes
 }
@@ -917,6 +920,9 @@ func (p *noder) structType(expr *syntax.StructType) ir.Node {
 		} else {
 			n = ir.NewField(p.pos(field), p.name(field.Name), p.typeExpr(field.Type), nil)
 		}
+		if i > 0 && expr.FieldList[i].Type == expr.FieldList[i-1].Type {
+			n.Ntype = l[i-1].Ntype
+		}
 		if i < len(expr.TagList) && expr.TagList[i] != nil {
 			n.Note = constant.StringVal(p.basicLit(expr.TagList[i]))
 		}
diff --git a/src/cmd/compile/internal/typecheck/iimport.go b/src/cmd/compile/internal/typecheck/iimport.go
index 3fb675f824..16b3e7ceba 100644
--- a/src/cmd/compile/internal/typecheck/iimport.go
+++ b/src/cmd/compile/internal/typecheck/iimport.go
@@ -745,6 +745,10 @@ func (r *importReader) typ1() *types.Type {
 			methods[i] = types.NewField(pos, sym, typ)
 		}
 
+		if len(embeddeds)+len(methods) == 0 {
+			return types.Types[types.TINTER]
+		}
+
 		t := types.NewInterface(r.currPkg, append(embeddeds, methods...))
 
 		// Ensure we expand the interface in the frontend (#25055).