diff --git a/pipewire-jack/src/pipewire-jack.c b/pipewire-jack/src/pipewire-jack.c
index cce941702..3ba41df3d 100644
--- a/pipewire-jack/src/pipewire-jack.c
+++ b/pipewire-jack/src/pipewire-jack.c
@@ -2480,6 +2480,8 @@ int jack_activate (jack_client_t *client)
 	c->activation->pending_sync = true;
 	c->active = true;
 
+	check_buffer_frames(c);
+
 	return 0;
 }