diff --git a/internal/rdb/structure/length.go b/internal/rdb/structure/length.go
index 628d50c..e62543f 100644
--- a/internal/rdb/structure/length.go
+++ b/internal/rdb/structure/length.go
@@ -11,7 +11,7 @@ const (
 	RDB6ByteLen  = 0 // RDB_6BITLEN
 	RDB14ByteLen = 1 // RDB_14BITLEN
 	len32or64Bit = 2
-	lenSpecial   = 3
+	lenSpecial   = 3 // RDB_ENCVAL
 	RDB32ByteLen = 0x80
 	RDB64ByteLen = 0x81
 )
diff --git a/internal/rdb/types/interface.go b/internal/rdb/types/interface.go
index aae14a9..ecfc9d1 100644
--- a/internal/rdb/types/interface.go
+++ b/internal/rdb/types/interface.go
@@ -28,7 +28,7 @@ const (
 	rdbTypeList    = 1
 	rdbTypeSet     = 2
 	rdbTypeZSet    = 3
-	rdbTypeHash    = 4
+	rdbTypeHash    = 4 // RDB_TYPE_HASH
 	rdbTypeZSet2   = 5 // ZSET version 2 with doubles stored in binary.
 	rdbTypeModule  = 6 // RDB_TYPE_MODULE
 	rdbTypeModule2 = 7 // RDB_TYPE_MODULE2 Module value with annotations for parsing without the generating module being loaded.