diff --git a/src/lb_chash.c b/src/lb_chash.c
index 469da71f5..23b2b1272 100644
--- a/src/lb_chash.c
+++ b/src/lb_chash.c
@@ -316,6 +316,8 @@ int chash_server_is_eligible(struct server *s)
  * will still both receive traffic. If any server is found, it will be returned.
  * It will also skip server <avoid> if the hash result ends on this one.
  * If no valid server is found, NULL is returned.
+ *
+ * The lbprm's lock will be used in R/O mode. The server's lock is not used.
  */
 struct server *chash_get_server_hash(struct proxy *p, unsigned int hash, const struct server *avoid)
 {
@@ -386,6 +388,8 @@ struct server *chash_get_server_hash(struct proxy *p, unsigned int hash, const s
 
 /* Return next server from the CHASH tree in backend <p>. If the tree is empty,
  * return NULL. Saturated servers are skipped.
+ *
+ * The lbprm's lock will be used in R/W mode. The server's lock is not used.
  */
 struct server *chash_get_next_server(struct proxy *p, struct server *srvtoavoid)
 {
diff --git a/src/lb_fas.c b/src/lb_fas.c
index 9f6dc24b9..fb581eb52 100644
--- a/src/lb_fas.c
+++ b/src/lb_fas.c
@@ -292,7 +292,7 @@ void fas_init_server_tree(struct proxy *p)
 /* Return next server from the FS tree in backend <p>. If the tree is empty,
  * return NULL. Saturated servers are skipped.
  *
- * The server's lock must be held. The lbprm's lock will be used.
+ * The lbprm's lock will be used. The server's lock is not used.
  */
 struct server *fas_get_next_server(struct proxy *p, struct server *srvtoavoid)
 {
diff --git a/src/lb_fwlc.c b/src/lb_fwlc.c
index 4e1b7307f..643489690 100644
--- a/src/lb_fwlc.c
+++ b/src/lb_fwlc.c
@@ -317,7 +317,7 @@ void fwlc_init_server_tree(struct proxy *p)
 /* Return next server from the FWLC tree in backend <p>. If the tree is empty,
  * return NULL. Saturated servers are skipped.
  *
- * The server's lock must be held. The lbprm's lock will be used.
+ * The lbprm's lock will be used in R/O mode. The server's lock is not used.
  */
 struct server *fwlc_get_next_server(struct proxy *p, struct server *srvtoavoid)
 {
diff --git a/src/lb_fwrr.c b/src/lb_fwrr.c
index e2cdd9f0d..d7f618faf 100644
--- a/src/lb_fwrr.c
+++ b/src/lb_fwrr.c
@@ -506,7 +506,7 @@ static inline void fwrr_update_position(struct fwrr_group *grp, struct server *s
  * the init tree if appropriate. If both trees are empty, return NULL.
  * Saturated servers are skipped and requeued.
  *
- * The lbprm's lock will be used. The server's lock is not used.
+ * The lbprm's lock will be used in R/W mode. The server's lock is not used.
  */
 struct server *fwrr_get_next_server(struct proxy *p, struct server *srvtoavoid)
 {