diff --git a/pkg/consts/consts.go b/pkg/consts/consts.go
index 7f3e1046b2..7797aa044b 100644
--- a/pkg/consts/consts.go
+++ b/pkg/consts/consts.go
@@ -26,7 +26,7 @@ const (
 	NamespaceVersionSize = 1
 
 	// NamespaceIDSize is the size of a namespace ID in bytes.
-	NamespaceIDSize = 32
+	NamespaceIDSize = 28
 
 	// NamespaceSize is the size of a namespace in bytes.
 	NamespaceSize = NamespaceIDSize + NamespaceVersionSize