diff --git a/src/shared/pam-util.c b/src/shared/pam-util.c
index fabe21f0cc..c93ab9afeb 100644
--- a/src/shared/pam-util.c
+++ b/src/shared/pam-util.c
@@ -179,6 +179,8 @@ int pam_acquire_bus_connection(
         if (r != PAM_SUCCESS)
                 return pam_syslog_pam_error(handle, LOG_ERR, r, "Failed to set PAM bus data: @PAMERR@");
 
+        pam_syslog(handle, LOG_DEBUG, "New sd-bus connection (%s) opened.", d->cache_id);
+
 success:
         *ret_bus = sd_bus_ref(d->bus);