diff --git a/misc/build.func b/misc/build.func
index 890f6974c..39e41ef89 100644
--- a/misc/build.func
+++ b/misc/build.func
@@ -3643,7 +3643,7 @@ start() {
     run_addon_updates
     update_motd_ip
     cleanup_lxc
-  elif ! command -v whiptail &>/dev/null || ! [ -t 0 ]; then
+  elif ! command -v whiptail &>/dev/null || ! [ -t 0 ] || [[ "$TERM" == "dumb" ]]; then
     msg_info "No interactive terminal detected – defaulting to silent update mode"
     VERBOSE="no"
     set_std_mode