diff --git a/src/server.c b/src/server.c
index a86a280..9ffa02a 100644
--- a/src/server.c
+++ b/src/server.c
@@ -1506,11 +1506,13 @@
 	else if (end[0] != '\0')
 		return "Trailing garbage in maxconn string";
 
+	HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
 	if (sv->maxconn == sv->minconn) { // static maxconn
 		sv->maxconn = sv->minconn = v;
 	} else { // dynamic maxconn
 		sv->maxconn = v;
 	}
+	HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
 
 	if (may_dequeue_tasks(sv, sv->proxy))
 		process_srv_queue(sv);
@@ -4750,8 +4752,6 @@
 	if (!sv)
 		return 1;
 
-	HA_SPIN_LOCK(SERVER_LOCK, &sv->lock);
-
 	warning = server_parse_maxconn_change_request(sv, args[4]);
 	if (warning) {
 		appctx->ctx.cli.severity = LOG_ERR;
@@ -4759,8 +4759,6 @@
 		appctx->st0 = CLI_ST_PRINT;
 	}
 
-	HA_SPIN_UNLOCK(SERVER_LOCK, &sv->lock);
-
 	return 1;
 }