diff --git a/bip-0121.mediawiki b/bip-0121.mediawiki
index 76513dd0..47d5665e 100644
--- a/bip-0121.mediawiki
+++ b/bip-0121.mediawiki
@@ -115,7 +115,7 @@ Send PoP for a transaction with label "video 42923" to
 <nowiki>https://www.example.com/pop/352</nowiki>, using nonce
 <tt>0x73 0xd5 0x1a 0xbb 0xd8 0x9c</tt>:
 <pre>
- btcpop:?p=https://www.example.com/pop/352&n=zgWTm8yH&label=video 42923
+ btcpop:?p=https://www.example.com/pop/352&n=zgWTm8yH&label=video%2042923
 </pre>
 Send PoP through mail using
 <nowiki>mailto:pop@example.com?subject=pop444</nowiki>, amount