diff --git a/src/bluewave.c b/src/bluewave.c
index 0b18d38..ecd477a 100644
--- a/src/bluewave.c
+++ b/src/bluewave.c
@@ -833,13 +833,13 @@ void bwave_upload_reply() {
 
 	if (netmail == 1) {
 		if (conf.netmail_sem != NULL) {
-			sem_fd = open(conf.netmail_sem, O_RDWR | O_CREAT, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
+			sem_fd = open(conf.netmail_sem, O_RDWR | O_CREAT | O_TRUNC, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
 			close(sem_fd);
 		}
 	} 
 	if (echomail == 1) {
 		if (conf.echomail_sem != NULL) {
-			sem_fd = open(conf.echomail_sem, O_RDWR | O_CREAT, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
+			sem_fd = open(conf.echomail_sem, O_RDWR | O_CREAT | O_TRUNC, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
 			close(sem_fd);
 		}						
 	}
diff --git a/src/mail_menu.c b/src/mail_menu.c
index 02739c7..ddda1a9 100644
--- a/src/mail_menu.c
+++ b/src/mail_menu.c
@@ -1846,12 +1846,12 @@ int read_message(struct user_record *user, struct msg_headers *msghs, int mailno
 					} else {
 						if (conf.mail_conferences[user->cur_mail_conf]->mail_areas[user->cur_mail_area]->type == TYPE_NETMAIL_AREA) {
 							if (conf.netmail_sem != NULL) {
-								sem_fd = open(conf.netmail_sem, O_RDWR | O_CREAT, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
+								sem_fd = open(conf.netmail_sem, O_RDWR | O_CREAT | O_TRUNC, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
 								close(sem_fd);
 							}
 						} else if (conf.mail_conferences[user->cur_mail_conf]->mail_areas[user->cur_mail_area]->type == TYPE_ECHOMAIL_AREA || conf.mail_conferences[user->cur_mail_conf]->mail_areas[user->cur_mail_area]->type == TYPE_NEWSGROUP_AREA) {
 							if (conf.echomail_sem != NULL) {
-								sem_fd = open(conf.echomail_sem, O_RDWR | O_CREAT, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
+								sem_fd = open(conf.echomail_sem, O_RDWR | O_CREAT | O_TRUNC, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
 								close(sem_fd);
 							}
 						}
@@ -2252,12 +2252,12 @@ void post_message(struct user_record *user) {
 		} else {
 			if (conf.mail_conferences[user->cur_mail_conf]->mail_areas[user->cur_mail_area]->type == TYPE_NETMAIL_AREA) {
 				if (conf.netmail_sem != NULL) {
-					sem_fd = open(conf.netmail_sem, O_RDWR | O_CREAT, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
+					sem_fd = open(conf.netmail_sem, O_RDWR | O_CREAT | O_TRUNC, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
 					close(sem_fd);
 				}
 			} else if (conf.mail_conferences[user->cur_mail_conf]->mail_areas[user->cur_mail_area]->type == TYPE_ECHOMAIL_AREA || conf.mail_conferences[user->cur_mail_conf]->mail_areas[user->cur_mail_area]->type == TYPE_NEWSGROUP_AREA) {
 				if (conf.echomail_sem != NULL) {
-					sem_fd = open(conf.echomail_sem, O_RDWR | O_CREAT, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
+					sem_fd = open(conf.echomail_sem, O_RDWR | O_CREAT | O_TRUNC, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
 					close(sem_fd);
 				}
 			}