diff --git a/src/server.c b/src/server.c
index e53d4847c..c299d202b 100644
--- a/src/server.c
+++ b/src/server.c
@@ -3122,9 +3122,9 @@ void srv_free_params(struct server *srv)
 	free(srv->hostname);
 	free(srv->hostname_dn);
 	free((char*)srv->conf.file);
-	free(srv->per_thr);
-	free(srv->per_tgrp);
-	free(srv->curr_idle_thr);
+	ha_aligned_free(srv->per_thr);
+	ha_aligned_free(srv->per_tgrp);
+	ha_aligned_free(srv->curr_idle_thr);
 	free(srv->pool_conn_name);
 	release_sample_expr(srv->pool_conn_name_expr);
 	free(srv->resolvers_id);
@@ -3482,7 +3482,7 @@ int srv_init(struct server *srv)
 
 	/* initialize idle conns lists */
 	if (srv->max_idle_conns != 0) {
-		srv->curr_idle_thr = calloc(global.nbthread, sizeof(*srv->curr_idle_thr));
+		srv->curr_idle_thr = ha_aligned_zalloc(64, global.nbthread * sizeof(*srv->curr_idle_thr));
 		if (!srv->curr_idle_thr) {
 			ha_alert("memory error during idle conn list init for %s/%s server\n",
 			         srv->proxy->id, srv->id);
@@ -5918,8 +5918,8 @@ static int srv_init_per_thr(struct server *srv)
 {
 	int i;
 
-	srv->per_thr = calloc(global.nbthread, sizeof(*srv->per_thr));
-	srv->per_tgrp = calloc(global.nbtgroups, sizeof(*srv->per_tgrp));
+	srv->per_thr = ha_aligned_zalloc(64, global.nbthread * sizeof(*srv->per_thr));
+	srv->per_tgrp = ha_aligned_zalloc(64, global.nbtgroups * sizeof(*srv->per_tgrp));
 	if (!srv->per_thr || !srv->per_tgrp)
 		return -1;