diff --git a/01.md b/01.md
index 7a304e0d..d822bfbc 100644
--- a/01.md
+++ b/01.md
@@ -84,7 +84,7 @@ And also a convention for kind ranges that allow for easier experimentation and
 - for kind `n` such that `1000 <= n < 10000`, events are **regular**, which means they're all expected to be stored by relays.
 - for kind `n` such that `10000 <= n < 20000 || n == 0 || n == 3`, events are **replaceable**, which means that, for each combination of `pubkey` and `kind`, only the latest event is expected to (SHOULD) be stored by relays, older versions are expected to be discarded.
 - for kind `n` such that `20000 <= n < 30000`, events are **ephemeral**, which means they are not expected to be stored by relays.
-- for kind `n` such that `30000 <= n < 40000`, events are **parameterized replaceable**, which means that, for each combination of `pubkey`, `kind` and the `d` tag, only the latest event is expected to be stored by relays, older versions are expected to be discarded.
+- for kind `n` such that `30000 <= n < 40000`, events are **parameterized replaceable**, which means that, for each combination of `pubkey`, `kind` and the `d` tag's first value, only the latest event is expected to be stored by relays, older versions are expected to be discarded.
 
 In case of replaceable events with the same timestamp, the event with the lowest id (first in lexical order) should be retained, and the other discarded.