diff --git a/spec/60-trace-id-format.md b/spec/60-trace-id-format.md
index bf30b92..68e118b 100644
--- a/spec/60-trace-id-format.md
+++ b/spec/60-trace-id-format.md
@@ -23,8 +23,8 @@ also allows tracing vendors to base sampling decisions on `trace-id` field value
 and avoid propagating an additional sampling context.
 
 If the `random-trace-id` flag is set, at least the right-most 7 bytes of the
-`trace-id` MUST be selected randomly (or pseudo-randomly) from a uniform
-distribution of all `2^56` possible values.
+`trace-id` MUST be selected randomly (or pseudo-randomly) with uniform distribution
+over the interval [0..2^56-1].
 
 As shown in the next section, if part of the `trace-id` is nonrandom,
 it is important for the random part of the `trace-id` to be as far right in the