diff --git a/blogo/metadata.go b/blogo/metadata.go
index 667d7b3..79a5e67 100644
--- a/blogo/metadata.go
+++ b/blogo/metadata.go
@@ -152,6 +152,9 @@ type TypedMetadata struct {
 }
 
 func NewTypedMetadata(m Metadata) *TypedMetadata {
+	if tm, ok := m.(*TypedMetadata); ok {
+		return tm
+	}
 	return &TypedMetadata{m}
 }