diff --git a/mail_menu.c b/mail_menu.c
index 16f0f17..1531392 100644
--- a/mail_menu.c
+++ b/mail_menu.c
@@ -81,7 +81,7 @@ unsigned long generate_msgid() {
 	
 	snprintf(buffer, 1024, "%s/msgserial", conf.bbs_path);
 	
-	fptr = fopen(buffer, "rw");
+	fptr = fopen(buffer, "r+");
 	if (fptr) {
 		flock(fileno(fptr), LOCK_EX);
 		fread(&lastread, sizeof(time_t), 1, fptr);
diff --git a/utils/mgpost/mgpost.c b/utils/mgpost/mgpost.c
index 24fea31..d022d03 100644
--- a/utils/mgpost/mgpost.c
+++ b/utils/mgpost/mgpost.c
@@ -172,7 +172,7 @@ unsigned long generate_msgid(char *bbs_path) {
 	
 	snprintf(buffer, 1024, "%s/msgserial", bbs_path);
 	
-	fptr = fopen(buffer, "rw");
+	fptr = fopen(buffer, "r+");
 	if (fptr) {
 		flock(fileno(fptr), LOCK_EX);
 		fread(&lastread, sizeof(time_t), 1, fptr);