diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index c7e2ecb..74aa5f9 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -221,6 +221,8 @@
  */
 void efi_signal_event(struct efi_event *event, bool check_tpl)
 {
+	if (event->is_signaled)
+		return;
 	if (event->group) {
 		struct efi_event *evt;