diff --git a/src/include/storage/relfilenode.h b/src/include/storage/relfilenode.h
index abec0032ddd092e70b887c3cad808186b6e0eb68..c995c10c4d389d16347962a9cd6f2d2715a92177 100644
--- a/src/include/storage/relfilenode.h
+++ b/src/include/storage/relfilenode.h
@@ -55,7 +55,7 @@ typedef enum ForkNumber
  * relNode identifies the specific relation.  relNode corresponds to
  * pg_class.relfilenode (NOT pg_class.oid, because we need to be able
  * to assign new physical files to relations in some situations).
- * Notice that relNode is only unique within a particular database.
+ * Notice that relNode is only unique within a particular tablespace.
  *
  * Note: spcNode must be GLOBALTABLESPACE_OID if and only if dbNode is
  * zero.  We support shared relations only in the "global" tablespace.