diff --git a/tape/types.go b/tape/types.go
index 448e0cf..70ba3a2 100644
--- a/tape/types.go
+++ b/tape/types.go
@@ -1,6 +1,9 @@
 // Package tape implements Table Pair Encoding.
 package tape
 
+// TODO: in math/rand: uint is capitalized like Uint, we need to replicate that
+// here
+
 import "fmt"
 
 // encoding and decoding functions must not make any allocations
@@ -31,7 +34,7 @@ type Int64 interface { ~uint64 | ~int64 }
 // UInt is any unsigned integer.
 type UInt interface { ~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 }
 // String is any string.
-type String interface { ~string }
+type String interface { ~string | ~[]uint8 }
 
 // DecodeI8 decodes an 8 bit integer from the given data.
 func DecodeI8[T Int8](data []byte) (value T, n int, err error) {