diff --git a/io/router/router.go b/io/router/router.go
index e3b3be8d..3f4a40aa 100644
--- a/io/router/router.go
+++ b/io/router/router.go
@@ -538,11 +538,11 @@ func (q *Router) collect() {
 
 		// Semantic ops.
 		case ops.TypeSemanticLabel:
-			lbl := encOp.Refs[0].(*string)
-			pc.semanticLabel(*lbl)
+			lbl := encOp.Refs[0].(string)
+			pc.semanticLabel(lbl)
 		case ops.TypeSemanticDesc:
-			desc := encOp.Refs[0].(*string)
-			pc.semanticDesc(*desc)
+			desc := encOp.Refs[0].(string)
+			pc.semanticDesc(desc)
 		case ops.TypeSemanticClass:
 			class := semantic.ClassOp(encOp.Data[1])
 			pc.semanticClass(class)
diff --git a/io/semantic/semantic.go b/io/semantic/semantic.go
index 7499fc8a..86e2b20e 100644
--- a/io/semantic/semantic.go
+++ b/io/semantic/semantic.go
@@ -40,14 +40,12 @@ type SelectedOp bool
 type DisabledOp bool
 
 func (l LabelOp) Add(o *op.Ops) {
-	s := string(l)
-	data := ops.Write1(&o.Internal, ops.TypeSemanticLabelLen, &s)
+	data := ops.Write1(&o.Internal, ops.TypeSemanticLabelLen, string(l))
 	data[0] = byte(ops.TypeSemanticLabel)
 }
 
 func (d DescriptionOp) Add(o *op.Ops) {
-	s := string(d)
-	data := ops.Write1(&o.Internal, ops.TypeSemanticDescLen, &s)
+	data := ops.Write1(&o.Internal, ops.TypeSemanticDescLen, string(d))
 	data[0] = byte(ops.TypeSemanticDesc)
 }