diff --git a/src/ulog.c b/src/ulog.c
index 2872de2..adcc38a 100644
--- a/src/ulog.c
+++ b/src/ulog.c
@@ -71,6 +71,7 @@ ulog_err_t ulog_subscribe(ulog_function_t fn, ulog_level_t threshold) {
     if (s_subscribers[i].fn == fn) {
       // already subscribed: update threshold and return immediately.
       s_subscribers[i].threshold = threshold;
+      s_lowest_log_level = ulog_lowest_log_level(); // Update lowest log level
       return ULOG_ERR_NONE;
 
     } else if (s_subscribers[i].fn == NULL) {