diff --git a/rfc/0004_ws2p_v1.md b/rfc/0004_ws2p_v1.md
index 916ad9e77ef8a1853a1101ee5800b9c72e6aa206..474dcb0b4cdd9aa012d982b5928b946e40f5416b 100644
--- a/rfc/0004_ws2p_v1.md
+++ b/rfc/0004_ws2p_v1.md
@@ -275,7 +275,7 @@ PUBKEY := public key of the issuer node of this head
 BLOCKSTAMP = `blockNumber-Hash`  
 WS2PID := unique identifier of the ws2p endpoint  
 SOFTWARE = `duniter-ts`  
-SOFT_VERSION = `X.Y.Z` (for example `1.6.14`)  
+SOFT_VERSION = `X.Y.Z-suffix` (for example `1.6.14-beta`)  
 POW_PREFIX := nonce prefix for proof of work (manually fixed by the user)
 
 #### sig field