diff --git a/gerer_bot.sh b/gerer_bot.sh
index 98cb4d1..b436519 100644
--- a/gerer_bot.sh
+++ b/gerer_bot.sh
@@ -1,7 +1,14 @@
 #!/bin/bash
+ETAT_PRECEDENT_FICHIER="/tmp/dernier_role_connu"
 ROLE=$(./verifier_role_db.sh)
+ROLE_PRECEDENT=$(cat "$ETAT_PRECEDENT_FICHIER" 2>/dev/null || echo "inconnu")
 BOT_TOURNE=$(docker ps -q -f name=bot-discord)
 
+if [ "$ROLE" != "$ROLE_PRECEDENT" ]; then
+    echo "$(date '+%Y-%m-%d %H:%M:%S') - changement de role : $ROLE_PRECEDENT -> $ROLE" >> /var/log/kuby-bascule.log
+fi
+echo "$ROLE" > "$ETAT_PRECEDENT_FICHIER"
+
 if [ "$ROLE" = "primary" ] && [ -z "$BOT_TOURNE" ]; then
     docker start bot-discord
 fi