--- lbbs/src/file_loader.c	2025/11/04 13:49:51	1.18
+++ lbbs/src/file_loader.c	2025/11/04 14:58:56	1.20
@@ -3,7 +3,7 @@
  * file_loader
  *   - shared memory based file loader
  *
- * Copyright (C) 2004-2025 by Leaflet <leaflet@leafok.com>
+ * Copyright (C) 2004-2025  Leaflet <leaflet@leafok.com>
  */
 
 #include "file_loader.h"
@@ -52,7 +52,7 @@ static void trie_file_dict_cleanup_cb(co
 {
 	int shmid = (int)value;
 
-	if (shmctl(shmid, IPC_RMID, NULL) == -1)
+	if (shmid != 0 && shmctl(shmid, IPC_RMID, NULL) == -1)
 	{
 		log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", shmid, errno);
 	}
@@ -172,7 +172,7 @@ int load_file(const char *filename)
 	{
 		log_error("trie_dict_set(%s) error\n", filename);
 
-		if (shmctl(shmid, IPC_RMID, NULL) == -1)
+		if (shmid != 0 && shmctl(shmid, IPC_RMID, NULL) == -1)
 		{
 			log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", shmid, errno);
 		}